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   2560633篇
  免费   183079篇
  国内免费   5906篇
耳鼻咽喉   34810篇
儿科学   82212篇
妇产科学   69763篇
基础医学   366196篇
口腔科学   73453篇
临床医学   232364篇
内科学   490699篇
皮肤病学   59060篇
神经病学   198428篇
特种医学   99090篇
外国民族医学   437篇
外科学   384824篇
综合类   55123篇
现状与发展   10篇
一般理论   826篇
预防医学   187008篇
眼科学   60938篇
药学   195708篇
  13篇
中国医学   7541篇
肿瘤学   151115篇
  2021年   22495篇
  2019年   21888篇
  2018年   31015篇
  2017年   23697篇
  2016年   26991篇
  2015年   31398篇
  2014年   42429篇
  2013年   60672篇
  2012年   84547篇
  2011年   88128篇
  2010年   52315篇
  2009年   48272篇
  2008年   79761篇
  2007年   84474篇
  2006年   84502篇
  2005年   80786篇
  2004年   77123篇
  2003年   73132篇
  2002年   69982篇
  2001年   129224篇
  2000年   132148篇
  1999年   109701篇
  1998年   29213篇
  1997年   25482篇
  1996年   25509篇
  1995年   24350篇
  1994年   22182篇
  1993年   20692篇
  1992年   82635篇
  1991年   79740篇
  1990年   77421篇
  1989年   74294篇
  1988年   67552篇
  1987年   65809篇
  1986年   62231篇
  1985年   58978篇
  1984年   43194篇
  1983年   36804篇
  1982年   20718篇
  1979年   38443篇
  1978年   26479篇
  1977年   23067篇
  1976年   20902篇
  1975年   22712篇
  1974年   27131篇
  1973年   26114篇
  1972年   24405篇
  1971年   22739篇
  1970年   21033篇
  1969年   19888篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
Quality of Life Research - The COVID-19 pandemic might add to the stressors experienced by people living with rheumatic diseases. This study aimed to examine rheumatic patients’ functional...  相似文献   
3.
Molnár  B.  Aroca  S.  Dobos  A.  Orbán  K.  Szabó  J.  Windisch  P.  Stähli  A.  Sculean  A. 《Clinical oral investigations》2022,26(12):7135-7142
Clinical Oral Investigations - To evaluate t he long-term outcomes following treatment of RT 1 multiple adjacent gingival recessions (MAGR) using the modified coronally advanced tunnel (MCAT) with...  相似文献   
4.

Physical activity brings significant health benefits to middle-aged adults, although the research to date has been focused on late adulthood. This study aims to examine how ageing affects the self-reported and accelerometer-derived measures of physical activity levels in middle-aged adults. We employed the data recorded in the UK Biobank and analysed the physical activity levels of 2,998 participants (1381 men and 1617 women), based on self-completion questionnaire and accelerometry measurement of physical activity. We also assessed the musculoskeletal health of the participants using the dual-energy X-ray absorptiometry (DXA) measurements provided by the UK Biobank. Participants were categorised into three groups according to their age: group I younger middle-aged (40 to 49 years), group II older middle-aged (50 to 59 years), and group III oldest middle-aged (60 to 69 years). Self-reported physical activity level increased with age and was the highest in group III, followed by group II and I (P?<?0.05). On the contrary, physical activity measured by accelerometry decreased significantly with age from group I to III (P?<?0.05), and the same pertained to the measurements of musculoskeletal health (P?<?0.05). It was also shown that middle-aged adults mostly engaged in low and moderate intensity activities. The opposing trends of the self-reported and measured physical activity levels may suggest that middle-aged adults over-report their activity level as they age. They should be aware of the difference between their perceived and actual physical activity levels, and objective measures would be useful to prevent the decline in musculoskeletal health.

  相似文献   
5.
Die Anaesthesiologie - Auch wenn für Anästhesiologen über Jahrzehnte die Prophylaxe und Therapie postoperativer Schmerzen im Rahmen des postoperativen Patientenkomforts an vorderster...  相似文献   
6.
7.
8.
9.
10.
PurposeUnderstanding the value of genetic screening and testing for monogenic disorders requires high-quality, methodologically robust economic evaluations. This systematic review sought to assess the methodological quality among such studies and examined opportunities for improvement.MethodsWe searched PubMed, Cochrane, Embase, and Web of Science for economic evaluations of genetic screening/testing (2013-2019). Methodological rigor and adherence to best practices were systematically assessed using the British Medical Journal checklist.ResultsAcross the 47 identified studies, there were substantial variations in modeling approaches, reporting detail, and sophistication. Models ranged from simple decision trees to individual-level microsimulations that compared between 2 and >20 alternative interventions. Many studies failed to report sufficient detail to enable replication or did not justify modeling assumptions, especially for costing methods and utility values. Meta-analyses, systematic reviews, or calibration were rarely used to derive parameter estimates. Nearly all studies conducted some sensitivity analysis, and more sophisticated studies implemented probabilistic sensitivity/uncertainty analysis, threshold analysis, and value of information analysis.ConclusionWe describe a heterogeneous body of work and present recommendations and exemplar studies across the methodological domains of (1) perspective, scope, and parameter selection; (2) use of uncertainty/sensitivity analyses; and (3) reporting transparency for improvement in the economic evaluation of genetic screening/testing.  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