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   2473718篇
  免费   183493篇
  国内免费   5535篇
耳鼻咽喉   35047篇
儿科学   78678篇
妇产科学   71580篇
基础医学   347640篇
口腔科学   71032篇
临床医学   216042篇
内科学   487211篇
皮肤病学   57224篇
神经病学   201044篇
特种医学   96135篇
外国民族医学   879篇
外科学   376248篇
综合类   57675篇
现状与发展   8篇
一般理论   863篇
预防医学   184381篇
眼科学   57758篇
药学   180174篇
  5篇
中国医学   5443篇
肿瘤学   137679篇
  2018年   25299篇
  2017年   19640篇
  2016年   21992篇
  2015年   24737篇
  2014年   35043篇
  2013年   52756篇
  2012年   70445篇
  2011年   74569篇
  2010年   44132篇
  2009年   42512篇
  2008年   70145篇
  2007年   75167篇
  2006年   76156篇
  2005年   73894篇
  2004年   71046篇
  2003年   68261篇
  2002年   66709篇
  2001年   119197篇
  2000年   122284篇
  1999年   102653篇
  1998年   28458篇
  1997年   25835篇
  1996年   25376篇
  1995年   24068篇
  1994年   22178篇
  1993年   20703篇
  1992年   78668篇
  1991年   75598篇
  1990年   73424篇
  1989年   70866篇
  1988年   65627篇
  1987年   64238篇
  1986年   61107篇
  1985年   57978篇
  1984年   43957篇
  1983年   37194篇
  1982年   22557篇
  1981年   20337篇
  1979年   40530篇
  1978年   28790篇
  1977年   24578篇
  1976年   22554篇
  1975年   24656篇
  1974年   29292篇
  1973年   28518篇
  1972年   27047篇
  1971年   24910篇
  1970年   23755篇
  1969年   22529篇
  1968年   21262篇
排序方式: 共有10000条查询结果,搜索用时 15 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.
6.
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   
7.
8.
9.
10.
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   
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