首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   78251篇
  免费   6660篇
  国内免费   2273篇
耳鼻咽喉   650篇
儿科学   1299篇
妇产科学   1174篇
基础医学   10283篇
口腔科学   981篇
临床医学   7015篇
内科学   10667篇
皮肤病学   733篇
神经病学   2141篇
特种医学   3571篇
外科学   8452篇
综合类   10200篇
一般理论   2篇
预防医学   4392篇
眼科学   627篇
药学   6158篇
  29篇
中国医学   1837篇
肿瘤学   16973篇
  2023年   1023篇
  2022年   2042篇
  2021年   2937篇
  2020年   2469篇
  2019年   2721篇
  2018年   2868篇
  2017年   2814篇
  2016年   2742篇
  2015年   2961篇
  2014年   5558篇
  2013年   5139篇
  2012年   4723篇
  2011年   5325篇
  2010年   4014篇
  2009年   4271篇
  2008年   4534篇
  2007年   4273篇
  2006年   3704篇
  2005年   3126篇
  2004年   2640篇
  2003年   2288篇
  2002年   1720篇
  2001年   1608篇
  2000年   1425篇
  1999年   1227篇
  1998年   964篇
  1997年   880篇
  1996年   753篇
  1995年   779篇
  1994年   687篇
  1993年   532篇
  1992年   450篇
  1991年   374篇
  1990年   325篇
  1989年   328篇
  1988年   295篇
  1987年   238篇
  1986年   184篇
  1985年   286篇
  1984年   296篇
  1983年   198篇
  1982年   262篇
  1981年   211篇
  1980年   206篇
  1979年   162篇
  1978年   128篇
  1977年   92篇
  1976年   86篇
  1975年   62篇
  1974年   64篇
排序方式: 共有10000条查询结果,搜索用时 218 毫秒
1.
背景国内外用于评估癌症患者支持性照护需求的量表较多,但有关此类量表质量的标准化评价研究及不同量表间的横向比较研究较为缺乏,也少有研究者对此类量表的测量特性进行系统的整合与评价。目的评价中文版癌症患者支持性照护需求量表的测量学性能及研究的方法学质量。方法2021年4月检索中国知网、万方数据知识服务平台、维普中文科技期刊全文数据库、中国生物医学文献数据库、PubMed、EmBase、Web of Science、CINAHL Complete数据库,获取有关中文版癌症患者支持性照护需求量表测量学性能评价的研究,检索时限均为建库至2021年3月30日。由两位研究者独立筛选文献、提取资料后,采用健康测量工具遴选标准(COSMIN)系统综述指南,在对量表的测量特性及研究的方法学质量进行评价的基础上,综合评定中文版癌症患者支持性照护需求评估量表各测量特性的证据等级,并形成对于量表的最终推荐意见。采用描述分析法对评价结果进行汇总、分析。结果共纳入15项研究,涉及8个中文版癌症患者支持性照护需求评估量表〔癌症患者支持性照护需求简明问卷中文版(SCNS-SF34)、中文版支持性照护需求筛查工具(SCNS-ST9-C)、癌症患者综合需求评估量表(CNAT)、癌症需求简明问卷(CNQ-SF)、中文版癌症患者未满足需求量表(CaSUN-C)、癌症患者未满足需求简明量表(SF-SUNS)、晚期癌症患者需求评估问卷(ACNQ-41)、晚期癌症患者需求评估表简表(ACNQ-29)〕。就量表的测量特性质量而言,除ACNQ-29的内容效度为"未提及"外,其余7个量表的内容效度均为"不确定";除CaSUN-C、SF-SUNS的结构效度为"充分"外,其余6个量表的结构效度均为"不确定";SCNS-SF34、CNQ-SF、CaSUN-C、SF-SUNS的内部一致性为"充分",ACNQ-41的内部一致性为"不充分",其余3个量表的内部一致性为"不确定";CNAT、CNQ-SF、ACNQ-29的假设检验为"未提及",CaSUN-C、SF-SUNS、ACNQ-41的假设检验为"不确定",SCNS-SF34、SCNS-ST9-C的假设检验为"充分";除ACNQ-41的稳定性为"不充分",SCNS-ST9-C、ACNQ-29的稳定性为"未提及"外,其余5个量表的稳定性均为"充分";仅SCNS-SF34的跨文化效度为"充分",其余7个量表的跨文化效度均为"未提及"。8个量表的推荐等级均为B级。结论SCNS-SF34的测量特性得到了最为全面的评价,其具有较好的信效度,且临床应用可行性高,可暂时被推荐使用,但上述结论仍有待更多高质量证据加以支撑。  相似文献   
2.
3.
总结1例直肠癌患者术后继发腹壁多处坏死性软组织感染的护理经验。护理要点:感染性休克的早期识别和有效控制;坏死性软组织感染的识别及护理,控制全身性感染再次发生;分阶段落实个体化镇痛,改善疼痛症状;分阶段动态落实营养支持方案;实施全程心理干预。经过122 d的精心护理,8处伤口全部愈合,患者恢复良好。  相似文献   
4.
5.
《Survey of ophthalmology》2023,68(5):940-956
Congenital aniridia is a panocular disorder that is typically characterized by iris hypoplasia and aniridia-associated keratopathy (AAK). AAK results in the progressive loss of corneal transparency and thereby loss of vision. Currently, there is no approved therapy to delay or prevent its progression, and clinical management is challenging because of phenotypic variability and high risk of complications after interventions; however, new insights into the molecular pathogenesis of AAK may help improve its management. Here, we review the current understanding about the pathogenesis and management of AAK. We highlight the biological mechanisms involved in AAK development with the aim to develop future treatment options, including surgical, pharmacological, cell therapies, and gene therapies.  相似文献   
6.
7.
《Drug discovery today》2022,27(3):808-821
Tyrosine kinases are enzymes that can transfer a phosphate group from ATP to a specific protein tyrosine, serine or threonine residue within a cell, operating as a switch that can turn ‘on’ and ‘off’ causing different physiological alterations in the body. Mutated kinases have been shown to display an equilibrium shift toward the activated state. Types I–III have been studied intensively leading to drugs like imatinib (type II), cobimetinib (type III), among others. It is the same scenario for types V–VII; however, there is a lacuna in information regarding type IV inhibitors, although recently some advances have surfaced. This review aims to accumulate the knowledge gained so far about type IV inhibitors.  相似文献   
8.
总结1例重型弥漫性轴索损伤伴肺挫裂伤患者的肺康复护理经验。护理要点包括:组建多学科肺康复管理团队,实施个性化呼吸支持与降阶梯序贯氧疗护理,精准廓清呼吸道,开展一体化的早期肺功能康复锻炼。经过多学科团队合作,患者入院后第12天撤离呼吸机,第17天拔除气管插管,第20天下床活动,第37天顺利出院,随访6个月,患者恢复良好。  相似文献   
9.
ObjectiveThis study aimed to 1) understand factors impacting the implementation of exercise communication and referral, and 2) explore integrated clinical approaches to exercise communication and referral in cancer care.MethodsSeven focus groups (N = 53) were conducted with clinicians and exercise professionals throughout Sydney, Australia. A sub-sample of participants (n = 9) attended a half-day workshop to identifying best practice approaches for moving forward. Data were analysed using thematic content analysis.ResultsTwo themes emerged: 1) Factors impacting the knowledge-to-action gap, inclusive of limited exercise specific knowledge and training opportunities, funding structure, and current referral process, and 2) Recommendations for a consistent and efficient way forward, detailing the need for oncologist-initiated communication, distribution of cancer-exercise resources, and access to exercise professionals with cancer expertise.ConclusionsThis study identified factors (e.g., cancer-exercise specific training, integration of exercise physiologists) influencing exercise counselling and referral. A potential implementation-referral approach accounting for these factors and how to incorporate exercise into a standard model of cancer care, is described. Future testing is required to determine feasibility and practicality of these approaches.Practical ImplicationsA pragmatic model is provided to guide implementation-referral, inclusive of oncologist-initiated communication exchange, relevant resources, and access to exercise professionals with cancer expertise.  相似文献   
10.
Many patients with terminal cancer wish to die at home and general practitioners in the United Kingdom have a critical role in providing this care. However, it has been suggested general practitioners lack confidence in end-of-life care. It is important to explore with general practitioners their experience and perspectives including feelings of confidence delivering end-of-life care to people with cancer. The aim of this study was to explore general practitioners experiences of providing end-of-life care for people with cancer in the home setting and their perceptions of confidence in this role as well as understanding implications this has on policy design. A qualitative study design was employed using semi-structured interviews and analysed using thematic analysis. Nineteen general practitioners from London were purposively sampled from eight general practices and a primary care university department in 2018–2019, supplemented with snowballing methods. Five main themes were constructed: (a) the subjective nature of defining palliative and end-of-life care; (b) importance of communication and managing expectations; (c) complexity in prescribing; (d) challenging nature of delivering end-of-life care; (e) the unclear role of primary care in palliative care. General practitioners viewed end-of-life care as challenging; specific difficulties surrounded communication and prescribing. These challenges coupled with a poorly defined role created a spread in perceived confidence. Experience and exposure were seen as enabling confidence. Specialist palliative care service expansion had important implications on deskilling of essential competencies and reducing confidence levels in general practitioners. This feeds into a complex cycle of causation, leading to further delegation of care.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号