乳头状-话题@MedSci - 梅斯（MedSci）

#乳头状#

100篇内容 | 2547人围观

关注话题

话题活跃用户

#插入话题

插入图片

最新最热

[GetTopicListResponse(id=2045049, encodeId=65472045049d3, content=<a href='/topic/show?id=a4d02358610' target=_blank style='color:#2F92EE;'>#乳头状#</a>, objectTitle=European Radiology：这一甲状腺乳头状癌的超声征象，作为超声科医生的你一定要知道！, objectType=article, longId=736491, objectId=f084e364913f, topicUrl=null, isHasObj=0, objectCover=null, objectUrl=/article/show_article.do?id=f084e364913f, replyNumber=0, likeNumber=103, createdTime=2023-05-20, rootId=0, userName=jianjun66, userId=ce5632, projectId=1, avatar=, status=1, hasArticle=1, attachment=null, ipAttribution=, moduleDTOList=[ModuleDTO(moduleId=f084e364913f, moduleTitle=European Radiology：这一甲状腺乳头状癌的超声征象，作为超声科医生的你一定要知道！, moduleType=article, hrefUrl=//m.capotfarm.com/article/show_article.do?id=f084e364913f)], followStatus=false, userIsMember=false, type=1, lengthMark=0), GetTopicListResponse(id=2045048, encodeId=89c620450480a, content=<a href='/topic/show?id=a4d02358610' target=_blank style='color:#2F92EE;'>#乳头状#</a>, objectTitle=European Radiology：如何通过影像学对甲状腺乳头状癌患者进行风险分层？, objectType=article, longId=729908, objectId=f91ae299088c, topicUrl=null, isHasObj=0, objectCover=null, objectUrl=/article/show_article.do?id=f91ae299088c, replyNumber=0, likeNumber=102, createdTime=2023-02-17, rootId=0, userName=jianjun66, userId=ce5632, projectId=1, avatar=, status=1, hasArticle=1, attachment=null, ipAttribution=, moduleDTOList=[ModuleDTO(moduleId=f91ae299088c, moduleTitle=European Radiology：如何通过影像学对甲状腺乳头状癌患者进行风险分层？, moduleType=article, hrefUrl=//m.capotfarm.com/article/show_article.do?id=f91ae299088c)], followStatus=false, userIsMember=false, type=1, lengthMark=0), GetTopicListResponse(id=2045047, encodeId=1125204504e91, content=<a href='/topic/show?id=a4d02358610' target=_blank style='color:#2F92EE;'>#乳头状#</a>, objectTitle=子宫内膜浆液性乳头状腺癌卵巢转移的研究, objectType=article, longId=724866, objectId=93f4e248663a, topicUrl=null, isHasObj=0, objectCover=null, objectUrl=/article/show_article.do?id=93f4e248663a, replyNumber=0, likeNumber=102, createdTime=2023-02-07, rootId=0, userName=jianjun66, userId=ce5632, projectId=1, avatar=, status=1, hasArticle=1, attachment=null, ipAttribution=, moduleDTOList=[ModuleDTO(moduleId=93f4e248663a, moduleTitle=子宫内膜浆液性乳头状腺癌卵巢转移的研究, moduleType=article, hrefUrl=//m.capotfarm.com/article/show_article.do?id=93f4e248663a)], followStatus=false, userIsMember=false, type=1, lengthMark=0), GetTopicListResponse(id=2045045, encodeId=c3eb204504511, content=<a href='/topic/show?id=a4d02358610' target=_blank style='color:#2F92EE;'>#乳头状#</a>, objectTitle=JCEM：乙醇消融治疗甲状腺乳头状癌转移淋巴结的长期疗效, objectType=article, longId=292415, objectId=4933292415fb, topicUrl=null, isHasObj=0, objectCover=null, objectUrl=/article/show_article.do?id=4933292415fb, replyNumber=0, likeNumber=98, createdTime=2022-04-18, rootId=0, userName=jianjun66, userId=ce5632, projectId=1, avatar=, status=1, hasArticle=1, attachment=null, ipAttribution=, moduleDTOList=[ModuleDTO(moduleId=4933292415fb, moduleTitle=JCEM：乙醇消融治疗甲状腺乳头状癌转移淋巴结的长期疗效, moduleType=article, hrefUrl=//m.capotfarm.com/article/show_article.do?id=4933292415fb)], followStatus=false, userIsMember=false, type=1, lengthMark=0), GetTopicListResponse(id=2045043, encodeId=6bef204504319, content=<a href='/topic/show?id=a4d02358610' target=_blank style='color:#2F92EE;'>#乳头状#</a>, objectTitle=Radiology：对于甲状腺乳头状癌患者，这一技术一定要知道！, objectType=article, longId=215612, objectId=2d1a2156126c, topicUrl=null, isHasObj=0, objectCover=null, objectUrl=/article/show_article.do?id=2d1a2156126c, replyNumber=0, likeNumber=94, createdTime=2021-08-30, rootId=0, userName=jianjun66, userId=ce5632, projectId=1, avatar=, status=1, hasArticle=1, attachment=null, ipAttribution=, moduleDTOList=[ModuleDTO(moduleId=2d1a2156126c, moduleTitle=Radiology：对于甲状腺乳头状癌患者，这一技术一定要知道！, moduleType=article, hrefUrl=//m.capotfarm.com/article/show_article.do?id=2d1a2156126c)], followStatus=false, userIsMember=false, type=1, lengthMark=0), GetTopicListResponse(id=2045044, encodeId=0fa920450443e, content=<a href='/topic/show?id=a4d02358610' target=_blank style='color:#2F92EE;'>#乳头状#</a>, objectTitle=JCEM：甲状腺乳头状癌复发危险因素的全面评估, objectType=article, longId=220765, objectId=95ef220e6584, topicUrl=null, isHasObj=0, objectCover=null, objectUrl=/article/show_article.do?id=95ef220e6584, replyNumber=0, likeNumber=99, createdTime=2022-08-03, rootId=0, userName=jianjun66, userId=ce5632, projectId=1, avatar=, status=1, hasArticle=1, attachment=null, ipAttribution=, moduleDTOList=[ModuleDTO(moduleId=95ef220e6584, moduleTitle=JCEM：甲状腺乳头状癌复发危险因素的全面评估, moduleType=article, hrefUrl=//m.capotfarm.com/article/show_article.do?id=95ef220e6584)], followStatus=false, userIsMember=false, type=1, lengthMark=0), GetTopicListResponse(id=2045046, encodeId=1eae2045046c8, content=<a href='/topic/show?id=a4d02358610' target=_blank style='color:#2F92EE;'>#乳头状#</a>, objectTitle=脉络丛乳头状瘤/癌丨影像诊断要点, objectType=article, longId=294817, objectId=cd8e29481e88, topicUrl=null, isHasObj=0, objectCover=null, objectUrl=/article/show_article.do?id=cd8e29481e88, replyNumber=0, likeNumber=111, createdTime=2022-12-04, rootId=0, userName=jianjun66, userId=ce5632, projectId=1, avatar=, status=1, hasArticle=1, attachment=null, ipAttribution=, moduleDTOList=[ModuleDTO(moduleId=cd8e29481e88, moduleTitle=脉络丛乳头状瘤/癌丨影像诊断要点, moduleType=article, hrefUrl=//m.capotfarm.com/article/show_article.do?id=cd8e29481e88)], followStatus=false, userIsMember=false, type=1, lengthMark=0), GetTopicListResponse(id=2045041, encodeId=c73d204504116, content=<a href='/topic/show?id=a4d02358610' target=_blank style='color:#2F92EE;'>#乳头状#</a>, objectTitle=Eur Radiol：MR纹理分析识别胰腺导管内乳头状黏液性肿瘤的恶性可能!, objectType=article, longId=208339, objectId=01a62083393f, topicUrl=null, isHasObj=0, objectCover=null, objectUrl=/article/show_article.do?id=01a62083393f, replyNumber=0, likeNumber=130, createdTime=2021-08-15, rootId=0, userName=heli0118, userId=21015, projectId=1, avatar=, status=1, hasArticle=1, attachment=null, ipAttribution=, moduleDTOList=[ModuleDTO(moduleId=01a62083393f, moduleTitle=Eur Radiol：MR纹理分析识别胰腺导管内乳头状黏液性肿瘤的恶性可能!, moduleType=article, hrefUrl=//m.capotfarm.com/article/show_article.do?id=01a62083393f)], followStatus=false, userIsMember=false, type=1, lengthMark=0), GetTopicListResponse(id=2045038, encodeId=80042045038fe, content=<a href='/topic/show?id=a4d02358610' target=_blank style='color:#2F92EE;'>#乳头状#</a>, objectTitle=Sci Rep：乳头状肾细胞癌亚型对肿瘤治疗效果的影响 , objectType=article, longId=204605, objectId=b6a5204605f3, topicUrl=null, isHasObj=0, objectCover=null, objectUrl=/article/show_article.do?id=b6a5204605f3, replyNumber=0, likeNumber=111, createdTime=2021-02-05, rootId=0, userName=jianjun66, userId=ce5632, projectId=1, avatar=, status=1, hasArticle=1, attachment=null, ipAttribution=, moduleDTOList=[ModuleDTO(moduleId=b6a5204605f3, moduleTitle=Sci Rep：乳头状肾细胞癌亚型对肿瘤治疗效果的影响 , moduleType=article, hrefUrl=//m.capotfarm.com/article/show_article.do?id=b6a5204605f3)], followStatus=false, userIsMember=false, type=1, lengthMark=0), GetTopicListResponse(id=2045042, encodeId=081120450420a, content=<a href='/topic/show?id=a4d02358610' target=_blank style='color:#2F92EE;'>#乳头状#</a>, objectTitle=Eur Radiol：儿童胰母细胞瘤与实性假乳头状肿瘤的CT和MR鉴别诊断, objectType=article, longId=208460, objectId=8967208460f4, topicUrl=null, isHasObj=0, objectCover=null, objectUrl=/article/show_article.do?id=8967208460f4, replyNumber=0, likeNumber=98, createdTime=2021-08-29, rootId=0, userName=jianjun66, userId=ce5632, projectId=1, avatar=, status=1, hasArticle=1, attachment=null, ipAttribution=, moduleDTOList=[ModuleDTO(moduleId=8967208460f4, moduleTitle=Eur Radiol：儿童胰母细胞瘤与实性假乳头状肿瘤的CT和MR鉴别诊断, moduleType=article, hrefUrl=//m.capotfarm.com/article/show_article.do?id=8967208460f4)], followStatus=false, userIsMember=false, type=1, lengthMark=0), GetTopicListResponse(id=2045036, encodeId=019a2045036c3, content=<a href='/topic/show?id=a4d02358610' target=_blank style='color:#2F92EE;'>#乳头状#</a>, objectTitle=Sci Rep：线粒体自噬相关基因PINK1和PARK2是乳头状肾细胞癌生存的独立预后标志物, objectType=article, longId=203395, objectId=7a2a2033959d, topicUrl=null, isHasObj=0, objectCover=null, objectUrl=/article/show_article.do?id=7a2a2033959d, replyNumber=0, likeNumber=111, createdTime=2021-06-25, rootId=0, userName=jianjun66, userId=ce5632, projectId=1, avatar=, status=1, hasArticle=1, attachment=null, ipAttribution=, moduleDTOList=[ModuleDTO(moduleId=7a2a2033959d, moduleTitle=Sci Rep：线粒体自噬相关基因PINK1和PARK2是乳头状肾细胞癌生存的独立预后标志物, moduleType=article, hrefUrl=//m.capotfarm.com/article/show_article.do?id=7a2a2033959d)], followStatus=false, userIsMember=false, type=1, lengthMark=0), GetTopicListResponse(id=2045037, encodeId=c77b204503e17, content=<a href='/topic/show?id=a4d02358610' target=_blank style='color:#2F92EE;'>#乳头状#</a>, objectTitle=J Gastroenterology: 保守治疗胰管内乳头状黏液性肿瘤临床结果分析, objectType=article, longId=203402, objectId=0b262034025c, topicUrl=null, isHasObj=0, objectCover=null, objectUrl=/article/show_article.do?id=0b262034025c, replyNumber=0, likeNumber=85, createdTime=2021-10-28, rootId=0, userName=jianjun66, userId=ce5632, projectId=1, avatar=, status=1, hasArticle=1, attachment=null, ipAttribution=, moduleDTOList=[ModuleDTO(moduleId=0b262034025c, moduleTitle=J Gastroenterology: 保守治疗胰管内乳头状黏液性肿瘤临床结果分析, moduleType=article, hrefUrl=//m.capotfarm.com/article/show_article.do?id=0b262034025c)], followStatus=false, userIsMember=false, type=1, lengthMark=0), GetTopicListResponse(id=2045032, encodeId=93e72045032b1, content=<a href='/topic/show?id=a4d02358610' target=_blank style='color:#2F92EE;'>#乳头状#</a>, objectTitle=左卵巢交界性粘液性乳头状囊腺瘤病例1例, objectType=article, longId=197139, objectId=3a1e19e13954, topicUrl=null, isHasObj=0, objectCover=null, objectUrl=/article/show_article.do?id=3a1e19e13954, replyNumber=0, likeNumber=76, createdTime=2021-03-21, rootId=0, userName=jianjun66, userId=ce5632, projectId=1, avatar=, status=1, hasArticle=1, attachment=null, ipAttribution=, moduleDTOList=[ModuleDTO(moduleId=3a1e19e13954, moduleTitle=左卵巢交界性粘液性乳头状囊腺瘤病例1例, moduleType=article, hrefUrl=//m.capotfarm.com/article/show_article.do?id=3a1e19e13954)], followStatus=false, userIsMember=false, type=1, lengthMark=0), GetTopicListResponse(id=2045039, encodeId=b66220450397d, content=<a href='/topic/show?id=a4d02358610' target=_blank style='color:#2F92EE;'>#乳头状#</a>, objectTitle=JNNP:COVID-19疫情封锁对乳头状水肿和特发性颅内高压的影响, objectType=article, longId=204881, objectId=52782048814f, topicUrl=null, isHasObj=0, objectCover=null, objectUrl=/article/show_article.do?id=52782048814f, replyNumber=0, likeNumber=120, createdTime=2021-09-28, rootId=0, userName=jianjun66, userId=ce5632, projectId=1, avatar=, status=1, hasArticle=1, attachment=null, ipAttribution=, moduleDTOList=[ModuleDTO(moduleId=52782048814f, moduleTitle=JNNP:COVID-19疫情封锁对乳头状水肿和特发性颅内高压的影响, moduleType=article, hrefUrl=//m.capotfarm.com/article/show_article.do?id=52782048814f)], followStatus=false, userIsMember=false, type=1, lengthMark=0), GetTopicListResponse(id=2045031, encodeId=56902045031e6, content=<a href='/topic/show?id=a4d02358610' target=_blank style='color:#2F92EE;'>#乳头状#</a>, objectTitle=ARCH PATHOL LAB MED：Anyplex II HPV28法检测人乳头状瘤病毒在口咽癌标本中的应用价值, objectType=article, longId=195021, objectId=8c0d19502163, topicUrl=null, isHasObj=0, objectCover=null, objectUrl=/article/show_article.do?id=8c0d19502163, replyNumber=0, likeNumber=92, createdTime=2020-09-05, rootId=0, userName=jianjun66, userId=ce5632, projectId=1, avatar=, status=1, hasArticle=1, attachment=null, ipAttribution=, moduleDTOList=[ModuleDTO(moduleId=8c0d19502163, moduleTitle=ARCH PATHOL LAB MED：Anyplex II HPV28法检测人乳头状瘤病毒在口咽癌标本中的应用价值, moduleType=article, hrefUrl=//m.capotfarm.com/article/show_article.do?id=8c0d19502163)], followStatus=false, userIsMember=false, type=1, lengthMark=0), GetTopicListResponse(id=2045040, encodeId=b50c2045040cb, content=<a href='/topic/show?id=a4d02358610' target=_blank style='color:#2F92EE;'>#乳头状#</a>, objectTitle=Lancet：舒尼替尼与三种MET激酶抑制剂用于转移性乳头状肾细胞癌的疗效对比, objectType=article, longId=207346, objectId=f9b820e346bb, topicUrl=null, isHasObj=0, objectCover=null, objectUrl=/article/show_article.do?id=f9b820e346bb, replyNumber=0, likeNumber=92, createdTime=2021-10-09, rootId=0, userName=jianjun66, userId=ce5632, projectId=1, avatar=, status=1, hasArticle=1, attachment=null, ipAttribution=, moduleDTOList=[ModuleDTO(moduleId=f9b820e346bb, moduleTitle=Lancet：舒尼替尼与三种MET激酶抑制剂用于转移性乳头状肾细胞癌的疗效对比, moduleType=article, hrefUrl=//m.capotfarm.com/article/show_article.do?id=f9b820e346bb)], followStatus=false, userIsMember=false, type=1, lengthMark=0), GetTopicListResponse(id=2045033, encodeId=baae20450337e, content=<a href='/topic/show?id=a4d02358610' target=_blank style='color:#2F92EE;'>#乳头状#</a>, objectTitle=Nat Commun：乳头状肾细胞癌的基因组和表观基因组进化史 , objectType=article, longId=197157, objectId=33ed19e157db, topicUrl=null, isHasObj=0, objectCover=null, objectUrl=/article/show_article.do?id=33ed19e157db, replyNumber=0, likeNumber=105, createdTime=2020-12-23, rootId=0, userName=jianjun66, userId=ce5632, projectId=1, avatar=, status=1, hasArticle=1, attachment=null, ipAttribution=, moduleDTOList=[ModuleDTO(moduleId=33ed19e157db, moduleTitle=Nat Commun：乳头状肾细胞癌的基因组和表观基因组进化史 , moduleType=article, hrefUrl=//m.capotfarm.com/article/show_article.do?id=33ed19e157db)], followStatus=false, userIsMember=false, type=1, lengthMark=0), GetTopicListResponse(id=2045028, encodeId=630a2045028b2, content=<a href='/topic/show?id=a4d02358610' target=_blank style='color:#2F92EE;'>#乳头状#</a>, objectTitle=喉吸切刀引导气管插管用于小儿支撑喉镜下激光喉乳头状瘤切除术1例报告, objectType=article, longId=188073, objectId=292a1880e3fd, topicUrl=null, isHasObj=0, objectCover=null, objectUrl=/article/show_article.do?id=292a1880e3fd, replyNumber=0, likeNumber=110, createdTime=2020-04-21, rootId=0, userName=jianjun66, userId=ce5632, projectId=1, avatar=, status=1, hasArticle=1, attachment=null, ipAttribution=, moduleDTOList=[ModuleDTO(moduleId=292a1880e3fd, moduleTitle=喉吸切刀引导气管插管用于小儿支撑喉镜下激光喉乳头状瘤切除术1例报告, moduleType=article, hrefUrl=//m.capotfarm.com/article/show_article.do?id=292a1880e3fd)], followStatus=false, userIsMember=false, type=1, lengthMark=0), GetTopicListResponse(id=2045035, encodeId=330d204503522, content=<a href='/topic/show?id=a4d02358610' target=_blank style='color:#2F92EE;'>#乳头状#</a>, objectTitle=Cell Death Dis：lncRNA DOCK9-AS2促进甲状腺乳头状癌的发生发展, objectType=article, longId=200795, objectId=266d200e9594, topicUrl=null, isHasObj=0, objectCover=null, objectUrl=/article/show_article.do?id=266d200e9594, replyNumber=0, likeNumber=143, createdTime=2021-05-12, rootId=0, userName=jianjun66, userId=ce5632, projectId=1, avatar=, status=1, hasArticle=1, attachment=null, ipAttribution=, moduleDTOList=[ModuleDTO(moduleId=266d200e9594, moduleTitle=Cell Death Dis：lncRNA DOCK9-AS2促进甲状腺乳头状癌的发生发展, moduleType=article, hrefUrl=//m.capotfarm.com/article/show_article.do?id=266d200e9594)], followStatus=false, userIsMember=false, type=1, lengthMark=0), GetTopicListResponse(id=2045029, encodeId=2580204502950, content=<a href='/topic/show?id=a4d02358610' target=_blank style='color:#2F92EE;'>#乳头状#</a>, objectTitle=Cell Death Dis：HOTAIRM1/miR-107/TDG通路调控甲状腺乳头状癌细胞的增殖及侵袭, objectType=article, longId=192543, objectId=da1b1925439c, topicUrl=null, isHasObj=0, objectCover=null, objectUrl=/article/show_article.do?id=da1b1925439c, replyNumber=0, likeNumber=0, createdTime=2020-11-12, rootId=0, userName=jianjun66, userId=ce5632, projectId=1, avatar=, status=1, hasArticle=1, attachment=null, ipAttribution=, moduleDTOList=[ModuleDTO(moduleId=da1b1925439c, moduleTitle=Cell Death Dis：HOTAIRM1/miR-107/TDG通路调控甲状腺乳头状癌细胞的增殖及侵袭, moduleType=article, hrefUrl=//m.capotfarm.com/article/show_article.do?id=da1b1925439c)], followStatus=false, userIsMember=false, type=1, lengthMark=0)] 梅斯话题小助手

乳头状

2020-05-29

jianjun66 (审核中...)

前往app查看评论内容

#乳头状#

European Radiology：这一甲状腺乳头状癌的超声征象，作为超声科医生的你一定要知道！

2023-05-20

jianjun66 (审核中...)

前往app查看评论内容

#乳头状#

European Radiology：如何通过影像学对甲状腺乳头状癌患者进行风险分层？

2023-02-17

jianjun66 (审核中...)

前往app查看评论内容

#乳头状#

子宫内膜浆液性乳头状腺癌卵巢转移的研究

2023-02-07

jianjun66 (审核中...)

前往app查看评论内容

#乳头状#

JCEM：乙醇消融治疗甲状腺乳头状癌转移淋巴结的长期疗效

2022-04-18

jianjun66 (审核中...)

前往app查看评论内容

#乳头状#

Radiology：对于甲状腺乳头状癌患者，这一技术一定要知道！

2021-08-30

jianjun66 (审核中...)

前往app查看评论内容

#乳头状#

JCEM：甲状腺乳头状癌复发危险因素的全面评估

2022-08-03

jianjun66 (审核中...)

前往app查看评论内容

#乳头状#

脉络丛乳头状瘤/癌丨影像诊断要点

2022-12-04

heli0118 (审核中...)

前往app查看评论内容

#乳头状#

Eur Radiol：MR纹理分析识别胰腺导管内乳头状黏液性肿瘤的恶性可能!

2021-08-15

jianjun66 (审核中...)

前往app查看评论内容

#乳头状#

Sci Rep：乳头状肾细胞癌亚型对肿瘤治疗效果的影响

2021-02-05

jianjun66 (审核中...)

前往app查看评论内容

#乳头状#

Eur Radiol：儿童胰母细胞瘤与实性假乳头状肿瘤的CT和MR鉴别诊断

2021-08-29

jianjun66 (审核中...)

前往app查看评论内容

#乳头状#

Sci Rep：线粒体自噬相关基因PINK1和PARK2是乳头状肾细胞癌生存的独立预后标志物

2021-06-25

jianjun66 (审核中...)

前往app查看评论内容

#乳头状#

J Gastroenterology: 保守治疗胰管内乳头状黏液性肿瘤临床结果分析

2021-10-28

jianjun66 (审核中...)

前往app查看评论内容

#乳头状#

左卵巢交界性粘液性乳头状囊腺瘤病例1例

2021-03-21

jianjun66 (审核中...)

前往app查看评论内容

#乳头状#

JNNP:COVID-19疫情封锁对乳头状水肿和特发性颅内高压的影响

2021-09-28

jianjun66 (审核中...)

前往app查看评论内容

#乳头状#

ARCH PATHOL LAB MED：Anyplex II HPV28法检测人乳头状瘤病毒在口咽癌标本中的应用价值

2020-09-05

jianjun66 (审核中...)

前往app查看评论内容

#乳头状#

Lancet：舒尼替尼与三种MET激酶抑制剂用于转移性乳头状肾细胞癌的疗效对比

2021-10-09

jianjun66 (审核中...)

前往app查看评论内容

#乳头状#

Nat Commun：乳头状肾细胞癌的基因组和表观基因组进化史

2020-12-23

jianjun66 (审核中...)

前往app查看评论内容

#乳头状#

喉吸切刀引导气管插管用于小儿支撑喉镜下激光喉乳头状瘤切除术1例报告

2020-04-21

jianjun66 (审核中...)

前往app查看评论内容

#乳头状#

Cell Death Dis：lncRNA DOCK9-AS2促进甲状腺乳头状癌的发生发展

2021-05-12

jianjun66 (审核中...)

前往app查看评论内容

#乳头状#

Cell Death Dis：HOTAIRM1/miR-107/TDG通路调控甲状腺乳头状癌细胞的增殖及侵袭

2020-11-12

科室
- - 订阅+
  - 更多科室
工具
服务