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   2743150篇
  免费   209960篇
  国内免费   6062篇
耳鼻咽喉   36365篇
儿科学   91010篇
妇产科学   75984篇
基础医学   389342篇
口腔科学   78058篇
临床医学   248955篇
内科学   537947篇
皮肤病学   63221篇
神经病学   219150篇
特种医学   103485篇
外国民族医学   696篇
外科学   413491篇
综合类   64198篇
现状与发展   7篇
一般理论   975篇
预防医学   210800篇
眼科学   64349篇
药学   198104篇
  7篇
中国医学   6608篇
肿瘤学   156420篇
  2019年   22135篇
  2018年   31719篇
  2017年   24064篇
  2016年   26766篇
  2015年   30200篇
  2014年   42335篇
  2013年   63039篇
  2012年   86196篇
  2011年   91446篇
  2010年   53911篇
  2009年   50810篇
  2008年   84663篇
  2007年   89847篇
  2006年   90669篇
  2005年   87264篇
  2004年   84006篇
  2003年   80045篇
  2002年   77165篇
  2001年   138850篇
  2000年   142338篇
  1999年   117887篇
  1998年   32543篇
  1997年   28699篇
  1996年   28739篇
  1995年   27518篇
  1994年   25141篇
  1993年   23410篇
  1992年   89900篇
  1991年   86288篇
  1990年   83043篇
  1989年   79693篇
  1988年   72942篇
  1987年   71263篇
  1986年   66794篇
  1985年   63597篇
  1984年   47549篇
  1983年   40253篇
  1982年   23561篇
  1981年   20963篇
  1979年   41933篇
  1978年   29201篇
  1977年   24574篇
  1976年   23137篇
  1975年   24048篇
  1974年   29101篇
  1973年   28072篇
  1972年   26160篇
  1971年   23977篇
  1970年   22600篇
  1969年   21044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