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   1424041篇
  免费   114308篇
  国内免费   3345篇
耳鼻咽喉   18483篇
儿科学   46982篇
妇产科学   41503篇
基础医学   202443篇
口腔科学   37982篇
临床医学   127416篇
内科学   286484篇
皮肤病学   33526篇
神经病学   118282篇
特种医学   54530篇
外国民族医学   464篇
外科学   212038篇
综合类   33000篇
现状与发展   3篇
一般理论   506篇
预防医学   111513篇
眼科学   31772篇
药学   99595篇
  1篇
中国医学   3365篇
肿瘤学   81806篇
  2021年   11015篇
  2019年   11843篇
  2018年   16789篇
  2017年   12851篇
  2016年   14441篇
  2015年   16218篇
  2014年   22866篇
  2013年   33832篇
  2012年   45996篇
  2011年   48545篇
  2010年   28531篇
  2009年   27353篇
  2008年   44883篇
  2007年   47402篇
  2006年   47941篇
  2005年   46392篇
  2004年   44225篇
  2003年   42196篇
  2002年   40648篇
  2001年   73356篇
  2000年   74877篇
  1999年   61891篇
  1998年   17154篇
  1997年   15565篇
  1996年   15698篇
  1995年   14905篇
  1994年   13497篇
  1993年   12678篇
  1992年   46095篇
  1991年   43749篇
  1990年   41781篇
  1989年   39795篇
  1988年   36435篇
  1987年   35631篇
  1986年   33089篇
  1985年   31533篇
  1984年   24014篇
  1983年   20183篇
  1982年   12317篇
  1981年   10872篇
  1979年   20874篇
  1978年   14725篇
  1977年   12196篇
  1976年   11487篇
  1975年   11722篇
  1974年   14118篇
  1973年   13661篇
  1972年   12745篇
  1971年   11576篇
  1970年   11013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