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   5406954篇
  免费   421141篇
  国内免费   16236篇
耳鼻咽喉   76997篇
儿科学   175208篇
妇产科学   144545篇
基础医学   799289篇
口腔科学   151988篇
临床医学   499586篇
内科学   990991篇
皮肤病学   125913篇
神经病学   447986篇
特种医学   212073篇
外国民族医学   1484篇
外科学   810016篇
综合类   151668篇
现状与发展   24篇
一般理论   2973篇
预防医学   453863篇
眼科学   128949篇
药学   388356篇
  26篇
中国医学   13942篇
肿瘤学   268454篇
  2021年   57525篇
  2019年   59836篇
  2018年   77743篇
  2017年   59603篇
  2016年   66150篇
  2015年   78224篇
  2014年   112772篇
  2013年   178690篇
  2012年   153339篇
  2011年   163905篇
  2010年   135271篇
  2009年   133768篇
  2008年   148928篇
  2007年   160980篇
  2006年   167402篇
  2005年   161540篇
  2004年   162070篇
  2003年   151799篇
  2002年   140333篇
  2001年   219645篇
  2000年   217916篇
  1999年   193879篇
  1998年   79119篇
  1997年   72688篇
  1996年   70808篇
  1995年   66315篇
  1994年   60328篇
  1993年   55936篇
  1992年   145103篇
  1991年   140051篇
  1990年   135545篇
  1989年   131414篇
  1988年   121279篇
  1987年   119171篇
  1986年   112401篇
  1985年   109202篇
  1984年   87331篇
  1983年   76424篇
  1982年   54850篇
  1981年   50602篇
  1980年   47388篇
  1979年   77479篇
  1978年   59320篇
  1977年   51933篇
  1976年   48317篇
  1975年   49974篇
  1974年   56426篇
  1973年   54219篇
  1972年   50783篇
  1971年   46961篇
排序方式: 共有10000条查询结果,搜索用时 265 毫秒
101.
102.
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   
103.
104.
105.
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   

106.
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   
107.
108.
109.
110.
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