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   4536873篇
  免费   359560篇
  国内免费   15731篇
耳鼻咽喉   62836篇
儿科学   146105篇
妇产科学   120536篇
基础医学   688247篇
口腔科学   125369篇
临床医学   409222篇
内科学   822994篇
皮肤病学   111897篇
神经病学   375243篇
特种医学   177349篇
外国民族医学   617篇
外科学   696578篇
综合类   131092篇
现状与发展   23篇
一般理论   2626篇
预防医学   371790篇
眼科学   108653篇
药学   320795篇
  25篇
中国医学   12920篇
肿瘤学   227247篇
  2021年   57059篇
  2019年   59781篇
  2018年   75807篇
  2017年   57578篇
  2016年   63852篇
  2015年   77000篇
  2014年   111834篇
  2013年   178171篇
  2012年   127965篇
  2011年   134061篇
  2010年   128538篇
  2009年   129391篇
  2008年   120239篇
  2007年   128448篇
  2006年   136297篇
  2005年   131428篇
  2004年   132290篇
  2003年   121736篇
  2002年   111208篇
  2001年   170265篇
  2000年   165349篇
  1999年   151518篇
  1998年   73198篇
  1997年   68438篇
  1996年   66264篇
  1995年   61649篇
  1994年   55838篇
  1993年   51670篇
  1992年   110219篇
  1991年   106033篇
  1990年   101848篇
  1989年   99575篇
  1988年   92245篇
  1987年   89918篇
  1986年   85425篇
  1985年   83707篇
  1984年   69362篇
  1983年   61938篇
  1982年   48837篇
  1981年   45397篇
  1980年   42552篇
  1979年   60006篇
  1978年   47855篇
  1977年   42935篇
  1976年   39628篇
  1975年   40013篇
  1974年   44109篇
  1973年   42452篇
  1972年   39829篇
  1971年   36740篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
111.
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   
112.
113.
114.
Introduction: Pharmacovigilance is essential to monitoring the safety profiles of authorized medicines. Compared with small-molecule drugs, biological drugs are more complex, more susceptible to structural variability due to manufacturing processes, and have the potential to induce immune-related reactions, underscoring the importance of safety monitoring for these products. Although highly similar to reference products, biosimilars are not expected to be structurally identical. For these reasons, proper reporting of potential adverse drug reactions (ADRs) using distinguishable names and batch numbers is essential for accurate tracing of all biological drugs. To address the need for robust pharmacovigilance, the European Parliament and Council of the European Union provided legislation regarding pharmacovigilance of biologics in 2010.

Areas covered: This narrative review examines the current state of pharmacovigilance for biologics in the European Union (EU) and discusses relevant information on pharmacovigilance of biosimilars, the current EU pharmacovigilance system, and areas that could be improved.

Expert opinion: Although steps have been taken to improve pharmacovigilance of biologics in the EU, several enhancements can still be made, including additional training for healthcare professionals on ADR reporting, the use of 2D barcodes that enhance traceability, and an open discussion of potentially missed opportunities in the pharmacovigilance of biosimilars.  相似文献   

115.
ABSTRACT

This project examined 55 picture books featuring transgender, gender expansive or genderqueer protagonists or narrators published between 2008 and 2018. The purpose of the study was to determine how this genre of children’s literature supports and challenges four gender assumptions: the gender binary, gender essentialism, sex/gender congruency and gender stability. Additionally, this critical analysis explored misgendering within this genre and themes of social rejection and acceptance. Protagonists and narrators were permitted a degree of gender nonconformity, however, the majority of picture books missed opportunities for a more complete exploration of gender possibilities.  相似文献   
116.
117.
118.
119.
120.
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