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   1521519篇
  免费   117551篇
  国内免费   5162篇
耳鼻咽喉   18949篇
儿科学   49171篇
妇产科学   44237篇
基础医学   212552篇
口腔科学   40649篇
临床医学   133903篇
内科学   309920篇
皮肤病学   39619篇
神经病学   127674篇
特种医学   58844篇
外国民族医学   468篇
外科学   228697篇
综合类   33959篇
现状与发展   3篇
一般理论   527篇
预防医学   118932篇
眼科学   32607篇
药学   105462篇
  1篇
中国医学   3443篇
肿瘤学   84615篇
  2021年   14590篇
  2019年   14771篇
  2018年   17898篇
  2017年   14448篇
  2016年   16340篇
  2015年   18308篇
  2014年   25177篇
  2013年   37228篇
  2012年   46504篇
  2011年   49335篇
  2010年   30486篇
  2009年   30208篇
  2008年   45656篇
  2007年   47932篇
  2006年   49225篇
  2005年   47514篇
  2004年   45458篇
  2003年   43851篇
  2002年   42091篇
  2001年   75462篇
  2000年   76543篇
  1999年   63899篇
  1998年   19509篇
  1997年   17857篇
  1996年   18081篇
  1995年   17704篇
  1994年   16146篇
  1993年   14979篇
  1992年   48474篇
  1991年   46063篇
  1990年   43737篇
  1989年   41992篇
  1988年   38280篇
  1987年   37555篇
  1986年   34983篇
  1985年   33522篇
  1984年   25875篇
  1983年   21969篇
  1982年   13920篇
  1981年   12511篇
  1979年   22082篇
  1978年   15977篇
  1977年   13490篇
  1976年   12427篇
  1975年   12770篇
  1974年   14895篇
  1973年   14365篇
  1972年   13328篇
  1971年   12096篇
  1970年   11494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.
Pharmaceutical Chemistry Journal - An HPLC-MS method for simultaneous quantitative determination of a novel gestagenic pharmaceutical and two of its metabolites in rat and rabbit blood sera was...  相似文献   
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