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   1698458篇
  免费   124055篇
  国内免费   3786篇
耳鼻咽喉   21760篇
儿科学   55695篇
妇产科学   46275篇
基础医学   241604篇
口腔科学   48786篇
临床医学   151703篇
内科学   334004篇
皮肤病学   38712篇
神经病学   131398篇
特种医学   63954篇
外国民族医学   242篇
外科学   257831篇
综合类   39042篇
现状与发展   4篇
一般理论   541篇
预防医学   124544篇
眼科学   40277篇
药学   123862篇
  7篇
中国医学   4481篇
肿瘤学   101577篇
  2021年   12864篇
  2019年   13598篇
  2018年   20027篇
  2017年   15290篇
  2016年   16661篇
  2015年   19012篇
  2014年   26308篇
  2013年   38068篇
  2012年   52907篇
  2011年   55590篇
  2010年   32871篇
  2009年   30772篇
  2008年   51678篇
  2007年   54958篇
  2006年   55387篇
  2005年   52679篇
  2004年   50871篇
  2003年   48283篇
  2002年   46494篇
  2001年   91850篇
  2000年   93667篇
  1999年   77016篇
  1998年   19749篇
  1997年   17293篇
  1996年   17417篇
  1995年   16774篇
  1994年   15307篇
  1993年   14101篇
  1992年   57445篇
  1991年   55330篇
  1990年   53024篇
  1989年   50800篇
  1988年   46174篇
  1987年   44987篇
  1986年   42260篇
  1985年   40027篇
  1984年   29397篇
  1983年   24943篇
  1982年   13923篇
  1979年   25566篇
  1978年   17600篇
  1977年   14924篇
  1976年   13892篇
  1975年   14579篇
  1974年   17650篇
  1973年   16970篇
  1972年   15696篇
  1971年   14475篇
  1970年   13449篇
  1969年   12549篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
111.
112.
113.
Three hundred and twenty samples of subgingival plaque were obtained from 80 caucasian girls, ranging from 10 to 13 years of age. The samples were analyzed to verify the influence of age upon colonization of the gingival sulcus by microorganisms potentially pathogenic to the periodontal tissues. The gingival and plaque status were evaluated through the gingival index (GI) and plaque index (PlI) and the microflora was assessed by the enzymatic method benzoyl-arginine-naphthylamide (BANA). The results of the BANA test were positive for 62.50% of the tested individuals and 40% of the examined sites. The influence of age was statistically significant on BANA reactivity, and the number of positive sites was greater at 11 (57.5%) than at 12 years (28.8%).  相似文献   
114.
115.
116.
Facial reanimation after acoustic neuroma excision is currently accomplished using a variety of surgical techniques. A multi-institutional survey of patient perceptions of facial reanimation success was accomplished by mailing a questionnaire to 809 randomly selected members of the Acoustic Neuroma Association. Four hundred sixty patients who underwent 296 reanimation procedures responded. Facial to hypoglossal nerve anastomosis, tarsorrhaphy, and upper eyelid implants were most frequently performed. The patient's estimations of initial deficit, spontaneous recovery, and overall satisfaction with the reanimation procedures are discussed.  相似文献   
117.
38 cases of acute multilocular osteomyelitis out of a total of 165 osteomyelitis patients were treated between 1974 and 1986 at the Department of Paediatric Surgery and Paediatric Diseases at the University of Mainz. Osteomyelitis in infants was separated from juvenile osteomyelitis because of the different problems inherent to this disease depending upon the age; likewise, multilocular remote involvement was separated from regional multiple involvement. It was found that distant involvement is of special importance in infancy. 6 of the 8 cases in this group presented with symmetrical involvement. This interesting phenomenon is described in this article for the first time in acute multilocular osteomyelitis; so far, it was known to occur only in chronic recurrent multifocal osteomyelitis (CRMO). The infants in this group were predominantly newborn who were particularly severely handicapped by predisposing factors such as necessary intensive-care measures or surgical interventions. Our findings showed that in this age group most of the problems occurred, namely: 3 deaths and 2 healing defects in 8 children. For this reason it is imperative to effect particularly close monitoring of multilocular acute osteomyelitis in infancy. This must be considered as a paediatric and paediatric-surgical emergency requiring not only accurate diagnostic measures but also early internistic and surgical treatment to improve the prognosis of this specific disease pattern.  相似文献   
118.
The Authors examine the correlation between hypertensive disorders of pregnancy and fetal growth. The results of a study of 342 pregnancies, confirm a significant correlation between hypertension and fetal growth retardation. These findings, so evident in moderate and severe hypertension, have also been confirmed in cases of mild hypertension. The medical treatment also in the pregnancies with mild hypertension, and a larger utilisation of operative deliveries, determined a decrease in perinatal mortality and morbidity.  相似文献   
119.
The decoction of Sclerocarya birroea Hochst. shows hypoglycaemic effects, an increase in plasma IRI in normal rats and an incremented oral-glucose tolerance. The decoction is also active against diet-induced hypercholesterolaemia.  相似文献   
120.
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