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   2727443篇
  免费   208676篇
  国内免费   6031篇
耳鼻咽喉   36168篇
儿科学   90472篇
妇产科学   75588篇
基础医学   387296篇
口腔科学   77662篇
临床医学   247311篇
内科学   535260篇
皮肤病学   62784篇
神经病学   217540篇
特种医学   103093篇
外国民族医学   696篇
外科学   411531篇
综合类   63910篇
现状与发展   7篇
一般理论   948篇
预防医学   209055篇
眼科学   64005篇
药学   197002篇
  7篇
中国医学   6592篇
肿瘤学   155223篇
  2019年   21933篇
  2018年   31475篇
  2017年   23850篇
  2016年   26542篇
  2015年   29929篇
  2014年   41997篇
  2013年   62286篇
  2012年   85393篇
  2011年   90505篇
  2010年   53360篇
  2009年   50302篇
  2008年   83709篇
  2007年   88889篇
  2006年   89727篇
  2005年   86364篇
  2004年   83094篇
  2003年   79202篇
  2002年   76340篇
  2001年   138661篇
  2000年   142167篇
  1999年   117703篇
  1998年   32331篇
  1997年   28517篇
  1996年   28599篇
  1995年   27366篇
  1994年   24974篇
  1993年   23250篇
  1992年   89728篇
  1991年   86112篇
  1990年   82865篇
  1989年   79544篇
  1988年   72811篇
  1987年   71154篇
  1986年   66659篇
  1985年   63472篇
  1984年   47400篇
  1983年   40098篇
  1982年   23382篇
  1981年   20803篇
  1979年   41807篇
  1978年   29104篇
  1977年   24480篇
  1976年   23040篇
  1975年   23960篇
  1974年   29007篇
  1973年   27981篇
  1972年   26059篇
  1971年   23908篇
  1970年   22525篇
  1969年   20993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