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   1440664篇
  免费   114696篇
  国内免费   3476篇
耳鼻咽喉   18689篇
儿科学   47198篇
妇产科学   41585篇
基础医学   206445篇
口腔科学   38388篇
临床医学   128349篇
内科学   289879篇
皮肤病学   34131篇
神经病学   119882篇
特种医学   55114篇
外国民族医学   464篇
外科学   214645篇
综合类   32886篇
现状与发展   3篇
一般理论   501篇
预防医学   111457篇
眼科学   32140篇
药学   100625篇
  1篇
中国医学   3367篇
肿瘤学   83087篇
  2021年   11142篇
  2019年   12087篇
  2018年   17044篇
  2017年   13048篇
  2016年   14748篇
  2015年   16555篇
  2014年   23218篇
  2013年   34416篇
  2012年   46787篇
  2011年   49421篇
  2010年   29184篇
  2009年   28029篇
  2008年   45980篇
  2007年   48484篇
  2006年   48969篇
  2005年   47561篇
  2004年   45355篇
  2003年   43286篇
  2002年   41831篇
  2001年   73302篇
  2000年   74762篇
  1999年   61895篇
  1998年   17434篇
  1997年   15791篇
  1996年   15922篇
  1995年   15091篇
  1994年   13664篇
  1993年   12810篇
  1992年   46025篇
  1991年   43659篇
  1990年   41638篇
  1989年   39701篇
  1988年   36332篇
  1987年   35474篇
  1986年   32975篇
  1985年   31425篇
  1984年   23994篇
  1983年   20173篇
  1982年   12391篇
  1981年   10933篇
  1979年   20791篇
  1978年   14701篇
  1977年   12199篇
  1976年   11479篇
  1975年   11706篇
  1974年   14081篇
  1973年   13620篇
  1972年   12713篇
  1971年   11517篇
  1970年   10959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