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   2728840篇
  免费   208719篇
  国内免费   6034篇
耳鼻咽喉   36174篇
儿科学   90508篇
妇产科学   75613篇
基础医学   387515篇
口腔科学   77692篇
临床医学   247464篇
内科学   535628篇
皮肤病学   62789篇
神经病学   217661篇
特种医学   103069篇
外国民族医学   696篇
外科学   411618篇
综合类   63933篇
现状与发展   7篇
一般理论   948篇
预防医学   209199篇
眼科学   64038篇
药学   197089篇
  7篇
中国医学   6592篇
肿瘤学   155353篇
  2019年   21931篇
  2018年   31479篇
  2017年   23852篇
  2016年   26547篇
  2015年   29930篇
  2014年   41997篇
  2013年   62311篇
  2012年   85416篇
  2011年   90539篇
  2010年   53375篇
  2009年   50312篇
  2008年   83757篇
  2007年   88921篇
  2006年   89759篇
  2005年   86379篇
  2004年   83110篇
  2003年   79219篇
  2002年   76366篇
  2001年   138677篇
  2000年   142183篇
  1999年   117722篇
  1998年   32337篇
  1997年   28520篇
  1996年   28603篇
  1995年   27368篇
  1994年   24982篇
  1993年   23252篇
  1992年   89738篇
  1991年   86122篇
  1990年   82877篇
  1989年   79550篇
  1988年   72816篇
  1987年   71161篇
  1986年   66668篇
  1985年   63479篇
  1984年   47403篇
  1983年   40101篇
  1982年   23385篇
  1981年   20809篇
  1979年   41819篇
  1978年   29110篇
  1977年   24486篇
  1976年   23047篇
  1975年   23968篇
  1974年   29020篇
  1973年   27986篇
  1972年   26066篇
  1971年   23913篇
  1970年   22544篇
  1969年   21027篇
排序方式: 共有10000条查询结果,搜索用时 31 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