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   3676461篇
  免费   255631篇
  国内免费   9473篇
耳鼻咽喉   49263篇
儿科学   121923篇
妇产科学   100301篇
基础医学   514696篇
口腔科学   102477篇
临床医学   335146篇
内科学   717584篇
皮肤病学   85649篇
神经病学   298703篇
特种医学   140001篇
外国民族医学   941篇
外科学   550089篇
综合类   78243篇
现状与发展   8篇
一般理论   1392篇
预防医学   282210篇
眼科学   84475篇
药学   266923篇
  12篇
中国医学   8004篇
肿瘤学   203525篇
  2019年   28686篇
  2018年   47494篇
  2017年   36392篇
  2016年   41832篇
  2015年   40383篇
  2014年   55751篇
  2013年   83196篇
  2012年   113798篇
  2011年   124560篇
  2010年   75984篇
  2009年   70872篇
  2008年   116451篇
  2007年   124907篇
  2006年   119198篇
  2005年   115511篇
  2004年   111510篇
  2003年   107918篇
  2002年   103538篇
  2001年   175931篇
  2000年   180206篇
  1999年   151408篇
  1998年   43128篇
  1997年   38044篇
  1996年   38096篇
  1995年   36955篇
  1994年   33811篇
  1993年   31659篇
  1992年   117174篇
  1991年   113047篇
  1990年   109413篇
  1989年   105681篇
  1988年   96649篇
  1987年   94670篇
  1986年   88864篇
  1985年   84858篇
  1984年   63244篇
  1983年   53681篇
  1982年   31525篇
  1981年   28049篇
  1979年   55985篇
  1978年   39302篇
  1977年   33415篇
  1976年   31188篇
  1975年   32959篇
  1974年   39338篇
  1973年   37587篇
  1972年   35094篇
  1971年   32572篇
  1970年   30122篇
  1969年   28792篇
排序方式: 共有10000条查询结果,搜索用时 0 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.
5.
6.
7.
8.
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   
9.
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   
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