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   3211836篇
  免费   235867篇
  国内免费   5014篇
耳鼻咽喉   45368篇
儿科学   105496篇
妇产科学   89248篇
基础医学   471685篇
口腔科学   89864篇
临床医学   287114篇
内科学   617712篇
皮肤病学   69972篇
神经病学   255128篇
特种医学   121985篇
外国民族医学   826篇
外科学   485306篇
综合类   67141篇
现状与发展   12篇
一般理论   1140篇
预防医学   252193篇
眼科学   75315篇
药学   240367篇
  12篇
中国医学   6311篇
肿瘤学   170522篇
  2018年   35298篇
  2017年   26621篇
  2016年   29903篇
  2015年   33939篇
  2014年   47610篇
  2013年   71511篇
  2012年   98880篇
  2011年   105314篇
  2010年   62425篇
  2009年   58939篇
  2008年   99345篇
  2007年   105994篇
  2006年   107066篇
  2005年   104000篇
  2004年   99432篇
  2003年   95759篇
  2002年   93124篇
  2001年   142031篇
  2000年   145654篇
  1999年   122976篇
  1998年   36537篇
  1997年   32110篇
  1996年   32455篇
  1995年   30499篇
  1994年   28300篇
  1993年   26596篇
  1992年   96835篇
  1991年   94679篇
  1990年   92792篇
  1989年   89756篇
  1988年   82981篇
  1987年   81408篇
  1986年   76991篇
  1985年   73771篇
  1984年   55122篇
  1983年   47201篇
  1982年   28359篇
  1981年   25394篇
  1979年   51521篇
  1978年   36604篇
  1977年   30930篇
  1976年   29431篇
  1975年   32056篇
  1974年   38123篇
  1973年   36526篇
  1972年   34511篇
  1971年   32530篇
  1970年   30105篇
  1969年   28768篇
  1968年   26799篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
103.
104.
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   
105.
106.
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   
107.
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   
108.
109.
110.
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