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   2601298篇
  免费   192523篇
  国内免费   7614篇
耳鼻咽喉   34552篇
儿科学   85847篇
妇产科学   71983篇
基础医学   365579篇
口腔科学   70068篇
临床医学   236924篇
内科学   519647篇
皮肤病学   62913篇
神经病学   214914篇
特种医学   100441篇
外国民族医学   737篇
外科学   389934篇
综合类   50710篇
现状与发展   5篇
一般理论   982篇
预防医学   198065篇
眼科学   57287篇
药学   189229篇
  8篇
中国医学   5339篇
肿瘤学   146271篇
  2021年   20383篇
  2019年   20943篇
  2018年   30032篇
  2017年   23363篇
  2016年   26884篇
  2015年   30170篇
  2014年   41406篇
  2013年   61483篇
  2012年   81109篇
  2011年   85330篇
  2010年   51741篇
  2009年   49990篇
  2008年   79839篇
  2007年   84584篇
  2006年   86307篇
  2005年   82418篇
  2004年   79371篇
  2003年   76628篇
  2002年   73917篇
  2001年   128818篇
  2000年   131689篇
  1999年   110879篇
  1998年   31508篇
  1997年   28123篇
  1996年   28387篇
  1995年   27546篇
  1994年   25215篇
  1993年   23562篇
  1992年   85450篇
  1991年   81827篇
  1990年   79032篇
  1989年   76278篇
  1988年   69671篇
  1987年   68190篇
  1986年   63753篇
  1985年   60717篇
  1984年   45108篇
  1983年   38073篇
  1982年   22582篇
  1981年   20113篇
  1979年   39117篇
  1978年   27558篇
  1977年   23370篇
  1976年   21596篇
  1975年   22931篇
  1974年   26928篇
  1973年   25526篇
  1972年   23846篇
  1971年   22045篇
  1970年   20263篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
Behçet disease is a complex, multisystem disease characterized by recurrent oral and genital ulcerations. It rarely occurs in infants or children. Neonatal Behçet disease has been reported in infants whose ulcers resolve at or before 9 weeks of age. Few cases of neonatal Behçet disease persisting into childhood have previously been reported. We report the case of a 1‐month‐old infant who presented with severe recurrent genital ulcerations and at 6 months developed recurrent oral ulcerations. Her orogenital ulcerations continue to recur. Human leukocyte antigen testing revealed HLA‐B51 and B44 positivity. This is a case of pediatric Behçet disease in the neonatal period. Behçet disease should be considered in the differential diagnosis of recurrent genital and oral ulcerations in infants and children.  相似文献   
102.
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   
103.
104.
105.
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   
106.
107.
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