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   1495382篇
  免费   118324篇
  国内免费   4192篇
耳鼻咽喉   19395篇
儿科学   48883篇
妇产科学   43149篇
基础医学   211381篇
口腔科学   39822篇
临床医学   133048篇
内科学   303136篇
皮肤病学   35013篇
神经病学   124758篇
特种医学   57315篇
外国民族医学   480篇
外科学   222863篇
综合类   34311篇
现状与发展   3篇
一般理论   529篇
预防医学   114756篇
眼科学   32836篇
药学   105053篇
  3篇
中国医学   3808篇
肿瘤学   87356篇
  2021年   12884篇
  2019年   13408篇
  2018年   18631篇
  2017年   14279篇
  2016年   15988篇
  2015年   18017篇
  2014年   25158篇
  2013年   36972篇
  2012年   50267篇
  2011年   52858篇
  2010年   31319篇
  2009年   29916篇
  2008年   48701篇
  2007年   51231篇
  2006年   51483篇
  2005年   49769篇
  2004年   47878篇
  2003年   45718篇
  2002年   44181篇
  2001年   75530篇
  2000年   76956篇
  1999年   63551篇
  1998年   17897篇
  1997年   16150篇
  1996年   16211篇
  1995年   15409篇
  1994年   13934篇
  1993年   13087篇
  1992年   47024篇
  1991年   44637篇
  1990年   42465篇
  1989年   40543篇
  1988年   37083篇
  1987年   36168篇
  1986年   33686篇
  1985年   32009篇
  1984年   24367篇
  1983年   20541篇
  1982年   12551篇
  1981年   11063篇
  1979年   21105篇
  1978年   14880篇
  1977年   12378篇
  1976年   11620篇
  1975年   11957篇
  1974年   14366篇
  1973年   13897篇
  1972年   12958篇
  1971年   11766篇
  1970年   11182篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
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   
3.
4.
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   
5.
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