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   221287篇
  免费   39267篇
  国内免费   7710篇
耳鼻咽喉   3527篇
儿科学   4416篇
妇产科学   5142篇
基础医学   15304篇
口腔科学   7621篇
临床医学   41126篇
内科学   43403篇
皮肤病学   4755篇
神经病学   17991篇
特种医学   7592篇
外国民族医学   40篇
外科学   30266篇
综合类   19468篇
现状与发展   60篇
一般理论   18篇
预防医学   22377篇
眼科学   5474篇
药学   14265篇
  115篇
中国医学   6594篇
肿瘤学   18710篇
  2024年   1067篇
  2023年   6582篇
  2022年   5049篇
  2021年   7992篇
  2020年   9203篇
  2019年   5528篇
  2018年   10550篇
  2017年   10782篇
  2016年   10950篇
  2015年   12973篇
  2014年   16795篇
  2013年   18664篇
  2012年   13456篇
  2011年   13941篇
  2010年   13988篇
  2009年   14950篇
  2008年   10891篇
  2007年   9786篇
  2006年   10563篇
  2005年   8499篇
  2004年   6068篇
  2003年   5332篇
  2002年   4515篇
  2001年   4866篇
  2000年   3949篇
  1999年   4285篇
  1998年   3340篇
  1997年   3088篇
  1996年   2907篇
  1995年   2606篇
  1994年   1946篇
  1993年   1396篇
  1992年   1615篇
  1991年   1416篇
  1990年   1162篇
  1989年   1076篇
  1988年   1014篇
  1987年   817篇
  1986年   700篇
  1985年   568篇
  1984年   427篇
  1983年   459篇
  1982年   313篇
  1981年   285篇
  1980年   183篇
  1979年   199篇
  1978年   230篇
  1977年   197篇
  1974年   164篇
  1972年   157篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.
23.
The association between asbestos exposure, mainly in occupational settings, and malignant mesothelioma has been well established; this has prompted several countries to establish mesothelioma epidemiologic surveillance programs often at the request of national agencies. This review compares currently existing mesothelioma registries worldwide to develop a concept model for a US real-time case capture mesothelioma registry. Five countries were identified with a mesothelioma specific registry, including Italy, France, UK, Australia, and South Korea. All, except the UK, used interviews to collect exposure data. Linkage with the national death index was available or was in future plans for all registries. The registries have limited information on treatment, quality of life, and other patient-centered outcomes such as symptoms and pain management. To thoroughly collect exposure data, “real-time” enrollment is preferable; to maximize the capture of mesothelioma cases, optimal coverage, and a simplified consent process are needed.  相似文献   
24.
25.
Major ursodeoxycholic acid (UDCA)-based therapies for primary biliary cirrhosis (PBC) include UDCA only, or combined with either methotrexate (MTX), corticosteroids (COT), colchicine (COC), or bezafibrate (BEF). As the optimum treatment regimen is unclear and warrants exploration, we aimed to compare these therapies in terms of patient mortality or liver transplantation (MOLT) and adverse events (AE).PubMed, the Cochrane Library, and Scopus were searched for randomized controlled trials up to August 31, 2014. We estimated the hazard ratios (HRs) for MOLT and odds ratios (ORs) for AE. A sensitivity analysis based on the dose of UDCA was also executed.Thirty-one eligible articles were included. Compared with COT plus UDCA, UDCA (HR 0.38, 95% confidence interval [CI] 0.09–1.39), BEF plus UDCA (HR 0.29, 95% CI 0.02–4.83), COC plus UDCA (HR 0.39, 95% CI 0.07–2.25), MTX plus UDCA (HR 0.28, 95% CI 0.05–1.63), or OBS (HR 0.49, 95% CI 0.11–2.01) all provided an increased risk of MOLT. With respect to drug AE profile, although not differing appreciably, BEF plus UDCA was associated with more AEs compared with UDCA (OR 3.16, 95% CI 0.59–20.67), COT plus UDCA (OR 2.27, 95% CI 0.15–33.36), COC plus UDCA (OR 1.00, 95% CI 0.09–12.16), MTX plus UDCA (OR 2.03, 95% CI 0.23–17.82), or OBS (OR 3.00, 95% CI 0.53–20.75). The results of sensitivity analyses were highly consistent with previous analyses.COT plus UDCA was the optimal UDCA-based regimen for both MOLT and AEs. BEF plus UDCA was most likely to cause AEs, whereas monotherapy with UDCA and coadministriation of COT plus UDCA appeared to be associated with the fewest AEs for PBC treatment.  相似文献   
26.
27.
The profile and reach of physiotherapy has expanded in areas of extended scope of practice, and broader engagement with population needs beyond the individual treatment encounter. These changes raise increasingly complex ethical challenges evidenced by growth in physiotherapy-based ethics studies and discussions. This paper examines how a broad cross section of Australian physiotherapists perceive, interpret, and respond to ethical challenges in their work contexts and how professional codes of conduct are used in their practice. Using an interpretive qualitative methodology, purposive sampling of 88 members of national clinical special interest groups were recruited for focus group discussions. Narrative-based and thematic data analysis identified ethical challenges as emerging from specific clinical contexts, and influenced by health organizations, funding policies, workplace relationships, and individually held perspectives. Five themes were developed to represent these findings: (1) the working environment, (2) balancing diverse needs and expectation, (3) defining ethics, (4) striving to act ethically, and (5) talking about ethics. The results portray a diverse and complex ethical landscape where therapists encounter and grapple with ethical questions emerging from the impact of funding models and policies affecting clinical work, expanding boundaries and scope of practice and changing professional roles and relationships. Codes of conduct were described as foundational ethical knowledge but not always helpful for “in the moment” ethical decision-making. Based on this research, we suggest how codes of conduct, educators, and professional associations could cultivate and nurture ethics capability in physiotherapy practitioners for these contemporary challenges.  相似文献   
28.
29.
30.
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