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   1731397篇
  免费   129516篇
  国内免费   3853篇
耳鼻咽喉   22122篇
儿科学   57097篇
妇产科学   47263篇
基础医学   246169篇
口腔科学   49109篇
临床医学   156491篇
内科学   340111篇
皮肤病学   39481篇
神经病学   135146篇
特种医学   64625篇
外国民族医学   242篇
外科学   261238篇
综合类   39251篇
现状与发展   5篇
一般理论   611篇
预防医学   130016篇
眼科学   40852篇
药学   126409篇
  7篇
中国医学   4514篇
肿瘤学   104007篇
  2021年   14210篇
  2019年   14949篇
  2018年   21496篇
  2017年   16408篇
  2016年   17880篇
  2015年   20270篇
  2014年   28051篇
  2013年   40393篇
  2012年   56355篇
  2011年   59019篇
  2010年   34760篇
  2009年   32344篇
  2008年   54318篇
  2007年   57589篇
  2006年   57897篇
  2005年   55007篇
  2004年   52873篇
  2003年   49941篇
  2002年   47981篇
  2001年   91966篇
  2000年   93723篇
  1999年   77139篇
  1998年   19981篇
  1997年   17449篇
  1996年   17532篇
  1995年   16874篇
  1994年   15379篇
  1993年   14149篇
  1992年   57434篇
  1991年   55307篇
  1990年   53011篇
  1989年   50792篇
  1988年   46164篇
  1987年   44958篇
  1986年   42252篇
  1985年   40007篇
  1984年   29382篇
  1983年   24939篇
  1982年   13914篇
  1979年   25539篇
  1978年   17593篇
  1977年   14919篇
  1976年   13884篇
  1975年   14576篇
  1974年   17633篇
  1973年   16960篇
  1972年   15683篇
  1971年   14459篇
  1970年   13435篇
  1969年   12522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.
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   
8.
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   
9.
10.
ABSTRACT

The lack of stable housing can impair access and continuity of care for patients living with human immunodeficiency virus (HIV). This study investigated the relationship between housing status assessed at multiple time points and several core HIV-related outcomes within the same group of HIV patients experiencing homelessness. Patients with consistently stable housing (CSH) during the year were compared to patients who lacked CSH (non-CSH group). The study outcomes included HIV viral load (VL), CD4 counts, and health care utilization. Multivariable and propensity weighted analyses were used to assess outcomes adjusting for potential group differences. Of 208 patients, 88 (42%) had CSH and 120 (58%) were non-CSH. Patients with CSH had significantly higher proportion of VL suppression and higher mean CD4 counts. The frequency of nurse visits in the CSH group was less than a half of that in the non-CSH group. Patients with CSH were less likely to be admitted to the medical respite facility, and if admitted, their length of stay was about a half of that for the non-CSH group. Our study findings show that patients with CSH had significantly better HIV virologic control and immune status as well as improved health care utilization.  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