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   3633297篇
  免费   256543篇
  国内免费   9487篇
耳鼻咽喉   48996篇
儿科学   120557篇
妇产科学   99722篇
基础医学   510089篇
口腔科学   102401篇
临床医学   333452篇
内科学   707572篇
皮肤病学   85625篇
神经病学   294251篇
特种医学   137582篇
外国民族医学   941篇
外科学   542112篇
综合类   78134篇
现状与发展   8篇
一般理论   1413篇
预防医学   279154篇
眼科学   84102篇
药学   265130篇
  12篇
中国医学   8014篇
肿瘤学   200060篇
  2021年   28282篇
  2019年   29079篇
  2018年   41353篇
  2017年   31519篇
  2016年   35761篇
  2015年   40528篇
  2014年   56055篇
  2013年   83815篇
  2012年   112959篇
  2011年   119597篇
  2010年   71553篇
  2009年   67911篇
  2008年   111187篇
  2007年   118293篇
  2006年   119879篇
  2005年   115021篇
  2004年   110600篇
  2003年   106416篇
  2002年   102740篇
  2001年   176009篇
  2000年   180092篇
  1999年   151485篇
  1998年   43110篇
  1997年   37970篇
  1996年   38109篇
  1995年   36919篇
  1994年   33786篇
  1993年   31629篇
  1992年   117226篇
  1991年   113062篇
  1990年   109420篇
  1989年   105706篇
  1988年   96656篇
  1987年   94702篇
  1986年   88899篇
  1985年   84875篇
  1984年   63286篇
  1983年   53706篇
  1982年   31526篇
  1979年   55989篇
  1978年   39328篇
  1977年   33451篇
  1976年   31185篇
  1975年   32995篇
  1974年   39388篇
  1973年   37656篇
  1972年   35141篇
  1971年   32627篇
  1970年   30141篇
  1969年   28830篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
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   
12.
13.
14.
15.
16.
17.
Graefe's Archive for Clinical and Experimental Ophthalmology - The published online version contains mistake as the author's first name and last name have been interchanged as "Hild...  相似文献   
18.
Krishna S. Iyer 《Platelets》2020,31(4):474-482
Abstract

Platelets are small, anucleated effector cells that play an important role in linking the hemostatic and inflammatory processes in the body. Platelet function is known to be altered under various inflammatory conditions including aging. A gain in platelet function during aging can increase the risk of thrombotic events, such as stroke and acute myocardial infarction. Anti-platelet therapy is designed to reduce risk of serious cerebrovascular and cardiovascular events, but the adverse consequences of therapy, such as risk for bleeding increases with aging as well. Age-associated comorbidities such as obesity, diabetes, and hyperlipidemia also contribute to increased platelet activity and thus can enhance the risk of thrombosis. Therefore, identification of unique mechanisms of platelet dysfunction in aging and in age-associated comorbidities is warranted to design novel antiplatelet drugs. This review outlines some of the current areas of research on aging-related mechanisms of platelet hyperactivity and addresses the clinical urgency for designing anti-platelet therapies toward novel molecular targets in the aging population.  相似文献   
19.
20.
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