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   2734523篇
  免费   194969篇
  国内免费   5852篇
耳鼻咽喉   37718篇
儿科学   86348篇
妇产科学   74772篇
基础医学   401008篇
口腔科学   78653篇
临床医学   245415篇
内科学   521789篇
皮肤病学   60868篇
神经病学   208861篇
特种医学   104975篇
外国民族医学   454篇
外科学   415828篇
综合类   63879篇
现状与发展   7篇
一般理论   849篇
预防医学   206716篇
眼科学   65707篇
药学   203375篇
  8篇
中国医学   6507篇
肿瘤学   151607篇
  2018年   29478篇
  2017年   22399篇
  2016年   25130篇
  2015年   28860篇
  2014年   40101篇
  2013年   58984篇
  2012年   81797篇
  2011年   86702篇
  2010年   51065篇
  2009年   47430篇
  2008年   80306篇
  2007年   86257篇
  2006年   85969篇
  2005年   82990篇
  2004年   80245篇
  2003年   76831篇
  2002年   74104篇
  2001年   127903篇
  2000年   130792篇
  1999年   109168篇
  1998年   30253篇
  1997年   26672篇
  1996年   26479篇
  1995年   25261篇
  1994年   23418篇
  1993年   21935篇
  1992年   85294篇
  1991年   83984篇
  1990年   81866篇
  1989年   79101篇
  1988年   72928篇
  1987年   71611篇
  1986年   67572篇
  1985年   64702篇
  1984年   48411篇
  1983年   41277篇
  1982年   23958篇
  1981年   21679篇
  1979年   45358篇
  1978年   32008篇
  1977年   26890篇
  1976年   25485篇
  1975年   27842篇
  1974年   33533篇
  1973年   32355篇
  1972年   30399篇
  1971年   28401篇
  1970年   26710篇
  1969年   25194篇
  1968年   23367篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
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   
2.

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   
3.
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   
4.
5.
6.
7.
8.
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   
9.
Journal of Behavioral Medicine - Evidence supports the use of graphic warnings to educate the public about the health harms of smoking and suggests warnings eliciting negative emotional responses...  相似文献   
10.
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