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   2422305篇
  免费   178670篇
  国内免费   3430篇
耳鼻咽喉   33337篇
儿科学   79469篇
妇产科学   65458篇
基础医学   358700篇
口腔科学   65600篇
临床医学   216699篇
内科学   470734篇
皮肤病学   54133篇
神经病学   191217篇
特种医学   91559篇
外国民族医学   520篇
外科学   366306篇
综合类   48596篇
现状与发展   12篇
一般理论   867篇
预防医学   186539篇
眼科学   56713篇
药学   180499篇
  10篇
中国医学   4800篇
肿瘤学   132637篇
  2021年   19298篇
  2019年   19869篇
  2018年   27556篇
  2017年   20757篇
  2016年   23397篇
  2015年   26394篇
  2014年   37110篇
  2013年   55445篇
  2012年   76583篇
  2011年   81349篇
  2010年   48311篇
  2009年   45749篇
  2008年   76602篇
  2007年   81627篇
  2006年   82547篇
  2005年   80151篇
  2004年   76738篇
  2003年   73932篇
  2002年   71642篇
  2001年   112940篇
  2000年   115607篇
  1999年   97084篇
  1998年   28087篇
  1997年   24718篇
  1996年   24921篇
  1995年   23511篇
  1994年   21605篇
  1993年   20453篇
  1992年   74455篇
  1991年   72532篇
  1990年   70820篇
  1989年   68013篇
  1988年   62398篇
  1987年   61107篇
  1986年   57173篇
  1985年   54888篇
  1984年   40709篇
  1983年   34518篇
  1982年   20549篇
  1979年   37263篇
  1978年   26685篇
  1977年   22094篇
  1976年   21099篇
  1975年   22770篇
  1974年   27126篇
  1973年   25747篇
  1972年   24038篇
  1971年   22835篇
  1970年   20993篇
  1969年   19944篇
排序方式: 共有10000条查询结果,搜索用时 312 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