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   1430975篇
  免费   114409篇
  国内免费   3435篇
耳鼻咽喉   18545篇
儿科学   47134篇
妇产科学   41923篇
基础医学   203361篇
口腔科学   38090篇
临床医学   128799篇
内科学   288205篇
皮肤病学   33681篇
神经病学   118569篇
特种医学   54254篇
外国民族医学   464篇
外科学   212738篇
综合类   33051篇
现状与发展   3篇
一般理论   510篇
预防医学   111737篇
眼科学   31909篇
药学   99885篇
  1篇
中国医学   3482篇
肿瘤学   82478篇
  2021年   11334篇
  2019年   12114篇
  2018年   17155篇
  2017年   13041篇
  2016年   14653篇
  2015年   16570篇
  2014年   23264篇
  2013年   34478篇
  2012年   46910篇
  2011年   49639篇
  2010年   29210篇
  2009年   27887篇
  2008年   45671篇
  2007年   48170篇
  2006年   48680篇
  2005年   47134篇
  2004年   44907篇
  2003年   42678篇
  2002年   41133篇
  2001年   73225篇
  2000年   74736篇
  1999年   61761篇
  1998年   17173篇
  1997年   15563篇
  1996年   15708篇
  1995年   14884篇
  1994年   13494篇
  1993年   12677篇
  1992年   45958篇
  1991年   43586篇
  1990年   41572篇
  1989年   39652篇
  1988年   36237篇
  1987年   35417篇
  1986年   32908篇
  1985年   31324篇
  1984年   23862篇
  1983年   20066篇
  1982年   12258篇
  1981年   10825篇
  1979年   20743篇
  1978年   14621篇
  1977年   12111篇
  1976年   11383篇
  1975年   11647篇
  1974年   14009篇
  1973年   13560篇
  1972年   12648篇
  1971年   11478篇
  1970年   10919篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
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   
2.
3.
4.
5.
Metabolism describes the series of chemical reactions that are concerned with the provision of energy to biological systems. They may be divided into reactions involved in energy yield (catabolism: demand exceeds supply), and energy storage (anabolism: supply exceeds demand). Regulation of these pathways is critical for homeostasis, and derangements in metabolism are seen in a wide variety of pathological processes. Understanding metabolism is key to the treatment of many diseases, notably diabetes, as well as underpinning clinical nutritional support.  相似文献   
6.
7.
8.
Sinus venosus atrial septal defect (SV‐ASD) usually coexists with partial anomalous pulmonary vein connection (PAPVC). It is a difficult diagnosis in transthoracic echocardiography (TTE) due to eccentric position of defects. We present a rare case of atypical anatomical variation in PAPVC, which was never described before. Two right pulmonary veins drained into superior vena cava, which overrode SV‐ASD and interatrial septum, a third pulmonary vein into the right atrium. Complete diagnosis could not be set after TTE, nor transesophageal echocardiography, whereas angio‐CT was finally conclusive. This diagnostic approach allowed the surgical planning.  相似文献   
9.
10.
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