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   2995549篇
  免费   222311篇
  国内免费   5105篇
耳鼻咽喉   41211篇
儿科学   99030篇
妇产科学   81703篇
基础医学   439383篇
口腔科学   83683篇
临床医学   272206篇
内科学   577162篇
皮肤病学   66662篇
神经病学   237508篇
特种医学   113120篇
外国民族医学   768篇
外科学   449671篇
综合类   64911篇
现状与发展   12篇
一般理论   1162篇
预防医学   236463篇
眼科学   70074篇
药学   221787篇
  13篇
中国医学   5875篇
肿瘤学   160561篇
  2019年   24064篇
  2018年   33380篇
  2017年   25314篇
  2016年   28488篇
  2015年   32053篇
  2014年   45150篇
  2013年   68257篇
  2012年   92989篇
  2011年   98967篇
  2010年   59017篇
  2009年   55675篇
  2008年   92931篇
  2007年   98921篇
  2006年   99883篇
  2005年   96811篇
  2004年   93053篇
  2003年   89575篇
  2002年   86747篇
  2001年   135754篇
  2000年   139333篇
  1999年   117257篇
  1998年   34150篇
  1997年   30161篇
  1996年   30375篇
  1995年   28881篇
  1994年   26657篇
  1993年   25117篇
  1992年   91692篇
  1991年   89621篇
  1990年   87631篇
  1989年   84416篇
  1988年   77476篇
  1987年   76497篇
  1986年   71621篇
  1985年   68882篇
  1984年   51477篇
  1983年   43712篇
  1982年   26150篇
  1979年   47471篇
  1978年   34058篇
  1977年   28455篇
  1976年   27255篇
  1975年   29055篇
  1974年   35055篇
  1973年   33395篇
  1972年   31199篇
  1971年   29524篇
  1970年   27209篇
  1969年   25849篇
  1968年   23774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