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   2424563篇
  免费   183567篇
  国内免费   8229篇
耳鼻咽喉   32698篇
儿科学   77257篇
妇产科学   63507篇
基础医学   355270篇
口腔科学   65231篇
临床医学   220884篇
内科学   467506篇
皮肤病学   52553篇
神经病学   188955篇
特种医学   91180篇
外国民族医学   517篇
外科学   362060篇
综合类   63494篇
现状与发展   25篇
一般理论   852篇
预防医学   189428篇
眼科学   56393篇
药学   183601篇
  64篇
中国医学   10369篇
肿瘤学   134515篇
  2021年   22746篇
  2019年   21979篇
  2018年   29587篇
  2017年   22982篇
  2016年   25135篇
  2015年   29116篇
  2014年   40496篇
  2013年   58679篇
  2012年   81277篇
  2011年   86233篇
  2010年   52371篇
  2009年   49038篇
  2008年   79575篇
  2007年   84324篇
  2006年   84896篇
  2005年   81619篇
  2004年   77511篇
  2003年   74541篇
  2002年   71629篇
  2001年   110502篇
  2000年   112779篇
  1999年   94518篇
  1998年   27538篇
  1997年   24270篇
  1996年   24471篇
  1995年   23061篇
  1994年   21226篇
  1993年   19908篇
  1992年   72203篇
  1991年   70269篇
  1990年   68585篇
  1989年   65812篇
  1988年   60463篇
  1987年   59251篇
  1986年   55329篇
  1985年   53083篇
  1984年   39364篇
  1983年   33449篇
  1982年   19885篇
  1979年   35891篇
  1978年   25666篇
  1977年   21242篇
  1976年   20347篇
  1975年   21829篇
  1974年   26167篇
  1973年   24814篇
  1972年   23216篇
  1971年   22054篇
  1970年   20269篇
  1969年   19322篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
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   
93.
94.
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   
95.
BackgroundSecond-hand smoking or environmental tobacco smoke is a critical health risk. Children are the most vulnerable to second-hand smoking because of their small bronchial ducts, less developed immunity, and low-physical activity.ObjectivesThe purpose of this study was to ascertain the effects of second-hand smoking on lung functions in athlete and non-athlete school-aged children.MethodsThis observational study included forty-six school-aged children, their age was 8–15 years, assigned to three groups; 2 study groups and 1 control group (n=15). The study groups comprised of 16 football players, and of 15 cyclists. Lung functions were evaluated recording forced vital capacity, forced expiratory volume in 1 sec and peak expiratory flow using digital spirometer.ResultsAll measures were recorded in definite values and the children were also classified into second-hand smoking (SH), or non-exposed to tobacco smoking (NE). The findings presented a significant increase (p<0.05) of the study groups in forced vital capacity, forced expiratory volume in 1 sec and peak expiratory flow solely for the non-exposed children. However, there were non-significant differences between the cyclists and football players or between the passive smoking children and non-exposed children in any of the two study groups (p>0.05).ConclusionThe outcomes of this study suggest beneficial influences of the sports activity on the lung functions, without different influences of the cyclists and football players on the lung functions.  相似文献   
96.
97.
98.
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