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   2875912篇
  免费   219786篇
  国内免费   6494篇
耳鼻咽喉   37805篇
儿科学   94467篇
妇产科学   78514篇
基础医学   406697篇
口腔科学   81044篇
临床医学   262234篇
内科学   565626篇
皮肤病学   64746篇
神经病学   232014篇
特种医学   107702篇
外国民族医学   709篇
外科学   433948篇
综合类   66579篇
现状与发展   9篇
一般理论   1199篇
预防医学   223892篇
眼科学   67161篇
药学   207652篇
  8篇
中国医学   6830篇
肿瘤学   163356篇
  2021年   23030篇
  2019年   24169篇
  2018年   34215篇
  2017年   26041篇
  2016年   28844篇
  2015年   32716篇
  2014年   46036篇
  2013年   68598篇
  2012年   94363篇
  2011年   100337篇
  2010年   59047篇
  2009年   55501篇
  2008年   93190篇
  2007年   99003篇
  2006年   99555篇
  2005年   96465篇
  2004年   92914篇
  2003年   88443篇
  2002年   85204篇
  2001年   140014篇
  2000年   143194篇
  1999年   119192篇
  1998年   34314篇
  1997年   30214篇
  1996年   30186篇
  1995年   28731篇
  1994年   26255篇
  1993年   24429篇
  1992年   90576篇
  1991年   86934篇
  1990年   83619篇
  1989年   80243篇
  1988年   73554篇
  1987年   71907篇
  1986年   67395篇
  1985年   64300篇
  1984年   48480篇
  1983年   41193篇
  1982年   24741篇
  1981年   22000篇
  1979年   42406篇
  1978年   29803篇
  1977年   25155篇
  1976年   23669篇
  1975年   24474篇
  1974年   29507篇
  1973年   28442篇
  1972年   26396篇
  1971年   24188篇
  1970年   22800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