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   1411552篇
  免费   113248篇
  国内免费   3338篇
耳鼻咽喉   18366篇
儿科学   46581篇
妇产科学   41053篇
基础医学   200818篇
口腔科学   37740篇
临床医学   126040篇
内科学   284491篇
皮肤病学   33357篇
神经病学   116899篇
特种医学   53838篇
外国民族医学   464篇
外科学   210542篇
综合类   32770篇
现状与发展   3篇
一般理论   487篇
预防医学   110068篇
眼科学   31489篇
药学   98518篇
  1篇
中国医学   3350篇
肿瘤学   81263篇
  2021年   10858篇
  2019年   11671篇
  2018年   16578篇
  2017年   12677篇
  2016年   14270篇
  2015年   16015篇
  2014年   22580篇
  2013年   33413篇
  2012年   45418篇
  2011年   47955篇
  2010年   28170篇
  2009年   27061篇
  2008年   44348篇
  2007年   46856篇
  2006年   47407篇
  2005年   45886篇
  2004年   43770篇
  2003年   41717篇
  2002年   40200篇
  2001年   73024篇
  2000年   74556篇
  1999年   61582篇
  1998年   16998篇
  1997年   15437篇
  1996年   15589篇
  1995年   14799篇
  1994年   13403篇
  1993年   12591篇
  1992年   45847篇
  1991年   43480篇
  1990年   41499篇
  1989年   39561篇
  1988年   36188篇
  1987年   35359篇
  1986年   32864篇
  1985年   31280篇
  1984年   23827篇
  1983年   20027篇
  1982年   12209篇
  1981年   10784篇
  1979年   20707篇
  1978年   14579篇
  1977年   12087篇
  1976年   11366篇
  1975年   11620篇
  1974年   13989篇
  1973年   13534篇
  1972年   12634篇
  1971年   11470篇
  1970年   10913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