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   2335972篇
  免费   174967篇
  国内免费   3279篇
耳鼻咽喉   32035篇
儿科学   75770篇
妇产科学   62665篇
基础医学   346861篇
口腔科学   63563篇
临床医学   210047篇
内科学   453683篇
皮肤病学   51684篇
神经病学   184448篇
特种医学   87902篇
外国民族医学   489篇
外科学   353180篇
综合类   47309篇
现状与发展   12篇
一般理论   848篇
预防医学   181625篇
眼科学   54145篇
药学   174797篇
  9篇
中国医学   4519篇
肿瘤学   128627篇
  2021年   18310篇
  2019年   19535篇
  2018年   27048篇
  2017年   20357篇
  2016年   22743篇
  2015年   25638篇
  2014年   36098篇
  2013年   53955篇
  2012年   74678篇
  2011年   79411篇
  2010年   47055篇
  2009年   44566篇
  2008年   74609篇
  2007年   79476篇
  2006年   80298篇
  2005年   77779篇
  2004年   74369篇
  2003年   71692篇
  2002年   69363篇
  2001年   108738篇
  2000年   111450篇
  1999年   93495篇
  1998年   26990篇
  1997年   23543篇
  1996年   22354篇
  1995年   22558篇
  1994年   20763篇
  1993年   19593篇
  1992年   71871篇
  1991年   70045篇
  1990年   68348篇
  1989年   65625篇
  1988年   60246篇
  1987年   59077篇
  1986年   55182篇
  1985年   52967篇
  1984年   39235篇
  1983年   33301篇
  1982年   19758篇
  1979年   35783篇
  1978年   25578篇
  1977年   21130篇
  1976年   20254篇
  1975年   21756篇
  1974年   26090篇
  1973年   24764篇
  1972年   23179篇
  1971年   22014篇
  1970年   20221篇
  1969年   19285篇
排序方式: 共有10000条查询结果,搜索用时 484 毫秒
101.
102.
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   
103.
104.
105.
106.
Objectives:To report if the association of epilepsy in pediatric patients (below the age of 15 years) with Insulin-dependent Diabetes (IDDM) at King Fahad Medical City (KFMC) is higher than the prevalence of epilepsy in the same age group (who have no IDDM) in our community. Consequently, we would determine if there is a relationship between the presence of epilepsy in diabetic children and the presence of positive antiGAD65 antibodies.Methods:This cohort study included 305 pediatric patients below the age of 15 years with Insulin-dependent Diabetes Mellitus (IDDM). They were randomly recruited at the Pediatric Endocrinology Clinic in KFMC. The patients’ caregivers were given a questionnaire between December 2015 till March 2019 to determine the seizure disorder history. There was also a retrospective review of 214 patients’ files for anti-GAD 65 positivity.Results:Our study found a significant relation between the presence of epilepsy in children with IDDM. Therefore, we could confirm the relationship between the existence of epilepsy in children with IDDM and having positive GAD65 antibodies.Conclusion:Our study supports the presence of consistent relation between having IDDM and having epilepsy in children and between the latter and the presence of positive GAD65 antibodies.

Insulin dependent diabetes Mellitus (IDDM) is a common condition in children and adolescents worldwide and so is epilepsy.1,2 Recently, there were increasing reports suggesting a potential association between having IDDM and the occurrence of epilepsy.3 Their association might represent simply a chance to relate their underlying mechanisms. However, the cause-effect relationship is not fully well defined. Literature from other countries have shown the increased prevalence of seizure disorders in this group of patients.4,5 There are scarce studies in the literature investigating IDDM characteristics contributing to having epilepsy, including positive GAD 65 antibodies. In this study that ran in King Fahad Medical City, Riyadh, Kingdom of Saudi Arabia (KSA) we are aiming to determine if the prevalence of epilepsy among 1DDM children under the age of 15 years (in our center) is higher than controls (same age without IDDM), and to check the positivity of anti-GAD 65 amongst those patients in order to find if there is a relationship between epilepsy in children with diabetes and the presence of positive GAD65 Antibodies.  相似文献   
107.
108.
109.
110.
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   
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