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   2644592篇
  免费   196150篇
  国内免费   4972篇
耳鼻咽喉   34927篇
儿科学   87201篇
妇产科学   72845篇
基础医学   382084篇
口腔科学   76542篇
临床医学   242074篇
内科学   513630篇
皮肤病学   59324篇
神经病学   208240篇
特种医学   98727篇
外国民族医学   496篇
外科学   389895篇
综合类   59813篇
现状与发展   6篇
一般理论   1042篇
预防医学   207839篇
眼科学   62237篇
药学   194268篇
  12篇
中国医学   5868篇
肿瘤学   148644篇
  2019年   20888篇
  2018年   29545篇
  2017年   22404篇
  2016年   24643篇
  2015年   28227篇
  2014年   39220篇
  2013年   58453篇
  2012年   80556篇
  2011年   85242篇
  2010年   50091篇
  2009年   47289篇
  2008年   79770篇
  2007年   84901篇
  2006年   85198篇
  2005年   82022篇
  2004年   79131篇
  2003年   75488篇
  2002年   73038篇
  2001年   128295篇
  2000年   131229篇
  1999年   109500篇
  1998年   29807篇
  1997年   26415篇
  1996年   26705篇
  1995年   25436篇
  1994年   23502篇
  1993年   21842篇
  1992年   84310篇
  1991年   82077篇
  1990年   79170篇
  1989年   76544篇
  1988年   70166篇
  1987年   68706篇
  1986年   65049篇
  1985年   61514篇
  1984年   45973篇
  1983年   39596篇
  1982年   22834篇
  1979年   42071篇
  1978年   29832篇
  1977年   25247篇
  1976年   23520篇
  1975年   25009篇
  1974年   30410篇
  1973年   29658篇
  1972年   27683篇
  1971年   25760篇
  1970年   24183篇
  1969年   22724篇
  1968年   21169篇
排序方式: 共有10000条查询结果,搜索用时 859 毫秒
91.
92.
ContextIt is especially important that patients are well informed when making high-stakes, preference-sensitive decisions like those on the Physician Orders for Life-Sustaining Treatment (POLST) form. However, there is currently no way to easily evaluate whether patients understand key concepts when making these important decisions.ObjectivesTo develop a POLST knowledge survey.MethodsExpert (n = 62) ratings of key POLST facts were used to select items for a POLST knowledge survey. The survey was administered to nursing facility residents (n = 97) and surrogate decision-makers (n = 112). A subset (n = 135) were re-administered the survey after a standardized advance care planning discussion to assess the scale's responsiveness to change.ResultsThe 19-item survey demonstrated adequate reliability (α = 0.72.). Residents' scores (x = 11.4, standard deviation 3.3) were significantly lower than surrogate scores (x = 14.7, standard deviation 2.5) (P < 0.001). Scores for both groups increased significantly after administration of a standardized advance care planning discussion (P < 0.001). Although being a surrogate, age, race, education, cognitive functioning, and health literacy were significantly associated with higher POLST Knowledge Survey scores in univariate analyses, only being a surrogate (P < 0.001) and being white (P = 0.028) remained significantly associated with higher scores in multivariate analyses.ConclusionThe 19-item POLST Knowledge Survey demonstrated adequate reliability and responsiveness to change. Findings suggest the survey could be used to identify knowledge deficits and provide targeted education to ensure adequate understanding of key clinical decisions when completing POLST.  相似文献   
93.
94.
Pharmaceutical Chemistry Journal - Three extracts were produced from the above-ground part of the meadowsweet Filipendula ulmaria (L.) Maxim. using water, 40% ethanol, and 70% ethanol. Comparative...  相似文献   
95.
Caring for patients with end-stage kidney disease (ESKD) in the United States is challenging, due in part to the complex epidemiology of the disease's progression as well as the ways in which care is delivered. As CKD progresses toward ESKD, the number of comorbidities increases and care involves multiple healthcare providers from multiple subspecialties. This occurs in the context of a fragmented US healthcare delivery system that is traditionally siloed by provider specialty, organization, as well as systems of payment and administration. This article describes the role of care fragmentation in the delivery of optimal ESKD care and identifies research gaps in the evidence across the continuum of care. We then consider the impact of care fragmentation on ESKD care from the patient and health system perspectives and explore opportunities for system-level interventions aimed at improving care for patients with ESKD.  相似文献   
96.
Nevo  N.  Goldstein  A. L.  Staierman  M.  Eran  N.  Carmeli  I.  Rayman  S.  mnouskin  Y. 《Hernia》2022,26(6):1491-1499
Hernia - The minimally invasive surgical repair of combined inguinal and ventral hernias often requires shifting from one approach or plane to another. The traditional enhanced-view totally...  相似文献   
97.
98.
As millions of people turn to social media for health information, better understanding the factors that guide health-related judgments and perceptions in this context is imperative. We report on two Web experiments (n > 400 total) examining the power of society’s widespread weight bias and related stereotypes to influence nutrition judgments in social media spaces. In Experiment 1, meals were judged as lower in nutritional quality when the person who recommended them (the source) was depicted as obese rather than of normal weight, an effect mediated by stereotypic beliefs about the source as a generally unhealthy person. Experiment 2 replicated this effect, which—notably—remained significant when controlling for objective nutritional information (calories and fat content). Results highlight spillover effects of weight bias that extend beyond person perception to color impressions of objects (here, food) that are associated with stigmatized attributes. Implications for everyday nutrition judgments and public health are considered.  相似文献   
99.
100.
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