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   3772113篇
  免费   325044篇
  国内免费   13956篇
耳鼻咽喉   51837篇
儿科学   120353篇
妇产科学   98745篇
基础医学   590624篇
口腔科学   104605篇
临床医学   338493篇
内科学   673647篇
皮肤病学   97111篇
神经病学   324399篇
特种医学   152077篇
外国民族医学   510篇
外科学   584059篇
综合类   114795篇
现状与发展   23篇
一般理论   2446篇
预防医学   312754篇
眼科学   87510篇
药学   265417篇
  17篇
中国医学   10307篇
肿瘤学   181384篇
  2021年   56127篇
  2020年   35798篇
  2019年   59032篇
  2018年   72790篇
  2017年   55199篇
  2016年   61243篇
  2015年   75005篇
  2014年   109678篇
  2013年   175204篇
  2012年   104463篇
  2011年   105907篇
  2010年   120570篇
  2009年   124396篇
  2008年   92678篇
  2007年   96653篇
  2006年   107320篇
  2005年   102381篇
  2004年   104320篇
  2003年   94520篇
  2002年   84114篇
  2001年   121801篇
  2000年   116021篇
  1999年   112548篇
  1998年   67561篇
  1997年   64987篇
  1996年   62902篇
  1995年   58482篇
  1994年   52622篇
  1993年   49126篇
  1992年   83447篇
  1991年   79864篇
  1990年   76364篇
  1989年   75015篇
  1988年   69810篇
  1987年   68479篇
  1986年   65282篇
  1985年   65128篇
  1984年   56822篇
  1983年   51492篇
  1982年   44910篇
  1981年   41606篇
  1980年   39178篇
  1979年   48828篇
  1978年   40792篇
  1977年   36471篇
  1976年   33852篇
  1975年   32663篇
  1974年   35491篇
  1973年   34181篇
  1972年   31780篇
排序方式: 共有10000条查询结果,搜索用时 375 毫秒
111.
112.
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   
113.
114.
115.
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   

116.
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   
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