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   2771701篇
  免费   211633篇
  国内免费   6152篇
耳鼻咽喉   36766篇
儿科学   91655篇
妇产科学   76705篇
基础医学   394216篇
口腔科学   78845篇
临床医学   251947篇
内科学   544048篇
皮肤病学   63382篇
神经病学   221621篇
特种医学   104898篇
外国民族医学   734篇
外科学   416938篇
综合类   64311篇
现状与发展   7篇
一般理论   1007篇
预防医学   212893篇
眼科学   64897篇
药学   200159篇
  7篇
中国医学   6711篇
肿瘤学   157739篇
  2021年   21539篇
  2019年   22638篇
  2018年   32245篇
  2017年   24419篇
  2016年   27225篇
  2015年   30703篇
  2014年   42971篇
  2013年   63947篇
  2012年   87522篇
  2011年   92738篇
  2010年   54906篇
  2009年   51632篇
  2008年   85707篇
  2007年   90927篇
  2006年   91761篇
  2005年   88295篇
  2004年   85008篇
  2003年   80967篇
  2002年   78162篇
  2001年   139729篇
  2000年   143271篇
  1999年   118738篇
  1998年   32929篇
  1997年   28983篇
  1996年   29002篇
  1995年   27788篇
  1994年   25313篇
  1993年   23619篇
  1992年   90524篇
  1991年   86880篇
  1990年   83619篇
  1989年   80339篇
  1988年   73451篇
  1987年   71769篇
  1986年   67282篇
  1985年   64042篇
  1984年   47847篇
  1983年   40504篇
  1982年   23690篇
  1979年   42210篇
  1978年   29360篇
  1977年   24710篇
  1976年   23244篇
  1975年   24220篇
  1974年   29300篇
  1973年   28224篇
  1972年   26292篇
  1971年   24118篇
  1970年   22711篇
  1969年   21172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.
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   
3.
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.

The exercise pressor reflex is a feedback mechanism engaged upon stimulation of mechano- and metabosensitive skeletal muscle afferents. Activation of these afferents elicits a reflex increase in heart rate, blood pressure, and ventilation in an intensity-dependent manner. Consequently, the exercise pressor reflex has been postulated to be one of the principal mediators of the cardiorespiratory responses to exercise. In this updated review, we will discuss classical and recent advancements in our understating of the exercise pressor reflex function in both human and animal models. Particular attention will be paid to the afferent mechanisms and pathways involved during its activation, its effects on different target organs, its potential role in the abnormal cardiovascular response to exercise in diseased states, and the impact of age and biological sex on these responses. Finally, we will highlight some unanswered questions in the literature that may inspire future investigations in the field.

  相似文献   
10.
The coronavirus disease 2019 (COVID-19) pandemic has rapidly created widespread impacts on global health and the economy. Data suggest that women are less susceptible to severe illness. However, sex-disaggregated data are incomplete, leaving room for misinterpretation, and focusing only on biologic sex underestimates the gendered impact of the pandemic on women. This narrative review summarizes what is known about gender disparities during the COVID-19 pandemic and the economic, domestic, and health burdens along with overlapping vulnerabilities related to the pandemic. In addition, this review outlines recommended strategies that advocacy groups, community leaders, and policymakers should implement to mitigate the widening gender disparities related to COVID-19.  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