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   3776040篇
  免费   312482篇
  国内免费   14664篇
耳鼻咽喉   50760篇
儿科学   119658篇
妇产科学   97952篇
基础医学   591721篇
口腔科学   102259篇
临床医学   341459篇
内科学   674766篇
皮肤病学   98566篇
神经病学   317748篇
特种医学   147014篇
外国民族医学   262篇
外科学   581591篇
综合类   114164篇
现状与发展   23篇
一般理论   2421篇
预防医学   312505篇
眼科学   89033篇
药学   261397篇
  26篇
中国医学   11417篇
肿瘤学   188444篇
  2021年   55776篇
  2020年   35529篇
  2019年   58695篇
  2018年   73017篇
  2017年   55744篇
  2016年   61603篇
  2015年   75274篇
  2014年   109541篇
  2013年   175053篇
  2012年   105716篇
  2011年   107596篇
  2010年   121129篇
  2009年   123903篇
  2008年   93839篇
  2007年   98357篇
  2006年   107863篇
  2005年   102515篇
  2004年   104056篇
  2003年   93902篇
  2002年   83144篇
  2001年   136086篇
  2000年   129645篇
  1999年   122032篇
  1998年   68646篇
  1997年   65274篇
  1996年   63008篇
  1995年   58543篇
  1994年   52530篇
  1993年   48894篇
  1992年   85027篇
  1991年   80949篇
  1990年   76663篇
  1989年   75097篇
  1988年   69007篇
  1987年   67194篇
  1986年   63529篇
  1985年   62759篇
  1984年   54872篇
  1983年   49577篇
  1982年   43622篇
  1981年   40990篇
  1980年   38456篇
  1979年   44840篇
  1978年   38236篇
  1977年   34915篇
  1976年   31960篇
  1975年   30786篇
  1974年   32481篇
  1973年   31175篇
  1972年   29031篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
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   
102.
The current study explored the influence of three methods of parental emotion discourse (structured story-telling, reminiscing, and picture book) and their relation to preschoolers’ emotion understanding. Thirty-seven families participated in the study. Analyses showed that the structured story-telling method produced more emotion words, was high in unique emotion words, and was high for both emotion labelling and explanations. All three methods showed some potential to predict preschooler’s emotion understanding. Structured story-telling was best at predicting role-taking, while reminiscing and the picture book both were better at predicting situation knowledge. Additional studies are needed to further explore the influence of different methods of assessing emotion discourse to enhance validity and reliability of research in this field.  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