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   2374156篇
  免费   177358篇
  国内免费   4648篇
耳鼻咽喉   32376篇
儿科学   76369篇
妇产科学   63190篇
基础医学   351453篇
口腔科学   64091篇
临床医学   214421篇
内科学   461729篇
皮肤病学   52320篇
神经病学   187082篇
特种医学   88891篇
外国民族医学   502篇
外科学   357336篇
综合类   51321篇
现状与发展   15篇
一般理论   866篇
预防医学   184460篇
眼科学   55333篇
药学   177458篇
  30篇
中国医学   5639篇
肿瘤学   131280篇
  2021年   20258篇
  2019年   20412篇
  2018年   28014篇
  2017年   21227篇
  2016年   23608篇
  2015年   26754篇
  2014年   37502篇
  2013年   55279篇
  2012年   76699篇
  2011年   81512篇
  2010年   48268篇
  2009年   45561篇
  2008年   76059篇
  2007年   80908篇
  2006年   81754篇
  2005年   79245篇
  2004年   75404篇
  2003年   72572篇
  2002年   70156篇
  2001年   109343篇
  2000年   112084篇
  1999年   94141篇
  1998年   27384篇
  1997年   23979篇
  1996年   24301篇
  1995年   22958篇
  1994年   21101篇
  1993年   19854篇
  1992年   72217篇
  1991年   70299篇
  1990年   68609篇
  1989年   65848篇
  1988年   60473篇
  1987年   59262篇
  1986年   55369篇
  1985年   53117篇
  1984年   39387篇
  1983年   33449篇
  1982年   19896篇
  1979年   35928篇
  1978年   25689篇
  1977年   21271篇
  1976年   20359篇
  1975年   21845篇
  1974年   26199篇
  1973年   24850篇
  1972年   23250篇
  1971年   22068篇
  1970年   20275篇
  1969年   19349篇
排序方式: 共有10000条查询结果,搜索用时 23 毫秒
31.
BackgroundThe aim of this study was to estimate the prevalence of dental prosthetic treatment and to investigate the demographic, social, economic and medical factors associated with the use of fixed and removable dentures in a representative sample of adults living in France.MethodsThe data were obtained from the 2002–2003 Decennial Health Survey, a cross-sectional study of a representative sample of the population living in France, which included 29,679 adults. Information was collected by interview. The variables collected were fixed denture, removable denture, age, gender, number of children, area of residence, nationality, educational attainment, family social status, employment status, annual household income per capita, supplementary insurance, chronic disease, eyesight problems/glasses, hearing problems/hearing aids. Multinomial logistic regression models were used to study the relationship between prosthetic treatment and demographic, socioeconomic and medical characteristics unadjusted, adjusted for age and adjusted for all the characteristics.ResultsThe prevalence of prosthetic treatment was 34.6% (95% confidence interval (CI): [34.1; 35.2]) for fixed prosthetic dentures and 13.8% (95% CI: [13.4; 14.2]) for removable prosthetic dentures. We showed a gradient between educational attainment and removable dentures; the odds ratio adjusted for all the variables (aOR) associated with no or primary education compared to post-secondary education was 2.56; 95% CI: [2.09; 3.13]. When annual household income per capita was low, subjects were less likely to report fixed dentures (aOR = 0.68; 95% CI: [0.62; 0.75]) than those with high annual household income per capita. Individuals without insurance less often reported fixed dentures than those with private insurance. Those reporting chronic disease were less likely to report fixed dentures (aOR = 0.87; 95% CI: [0.79; 0.95]) but more likely to report removable dentures (aOR = 1.29; 95% CI: [1.17; 1.43]) than those without chronic disease.ConclusionThis study reveals social, economic and medical inequalities in fixed and removable prosthetic treatment among adults in France.  相似文献   
32.
33.
34.
35.
Graefe's Archive for Clinical and Experimental Ophthalmology - The published online version contains mistake as the author's first name and last name have been interchanged as "Hild...  相似文献   
36.
37.
38.
39.
The present study aimed at examining the curative effect of modified posterior operation on treatment of Kümmell''s disease.About 30 patients of Kümmell''s disease with complete image and clinical data treated during June 2004 to July 2013 were conducted with anterior and posterior approaches, respectively. Kyphotic Cobb angle, fractured vertebra wedge angle, and the anterior and posterior heights of fractured vertebra were all measured through x-ray before and after operation, and the pain visual analog scale (VAS) was determined for evaluating the effect of operations. The injury and restoration of neurological function were assessed using Frankel classification.Patients in group A were treated with anterior operation, whereas group B was posterior operation. Postoperatively, VAS score, kyphotic Cobb angle, anterior vertebra height, and pathologic vertebra wedge angle were all significantly improved in patients with Kümmell''s disease receiving modified posterior operation (group B). Similar results were also observed in patients with anterior operation. The improvement of VAS and correction rate of kyphotic Cobb angle indicated equivalent effects of posterior and anterior operations. Meanwhile, alleviated neurological function damage was observed in 2 groups. Relevant factor analysis illustrated that there was no significant correlation of the severity and improvement rate of pain symptoms with age, medical history, anterior and posterior vertebra heights, kyphotic Cobb angle, and pathological vertebra wedge angle.Compared with traditional anterior approach, modified posterior operation, adopting transpedicular vertebral body grafting combined with vertebral pedicle screw fixation, could produce equivalent effects on kyphosis correction, pain relief, and improvement of neurological function in patients with Kümmell''s disease.  相似文献   
40.
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