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   2450923篇
  免费   171190篇
  国内免费   4365篇
耳鼻咽喉   32357篇
儿科学   80697篇
妇产科学   67265篇
基础医学   342093篇
口腔科学   64385篇
临床医学   215424篇
内科学   475011篇
皮肤病学   53609篇
神经病学   197824篇
特种医学   97021篇
外国民族医学   665篇
外科学   372021篇
综合类   52268篇
现状与发展   3篇
一般理论   712篇
预防医学   188067篇
眼科学   54502篇
药学   179260篇
  8篇
中国医学   6098篇
肿瘤学   147188篇
  2019年   17610篇
  2018年   46014篇
  2017年   35923篇
  2016年   41183篇
  2015年   25419篇
  2014年   35019篇
  2013年   51467篇
  2012年   75318篇
  2011年   93000篇
  2010年   60632篇
  2009年   51990篇
  2008年   86848篇
  2007年   94105篇
  2006年   73485篇
  2005年   72764篇
  2004年   71015篇
  2003年   69676篇
  2002年   65387篇
  2001年   118356篇
  2000年   121731篇
  1999年   101098篇
  1998年   27161篇
  1997年   24377篇
  1996年   24325篇
  1995年   22967篇
  1994年   20975篇
  1993年   19716篇
  1992年   76118篇
  1991年   72986篇
  1990年   70845篇
  1989年   67759篇
  1988年   61881篇
  1987年   60227篇
  1986年   56575篇
  1985年   53544篇
  1984年   39916篇
  1983年   33677篇
  1982年   19670篇
  1981年   17160篇
  1979年   35353篇
  1978年   24420篇
  1977年   20969篇
  1976年   19092篇
  1975年   20473篇
  1974年   24299篇
  1973年   23409篇
  1972年   22195篇
  1971年   20450篇
  1970年   19202篇
  1969年   18166篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
ABSTRACT

Objective: Dry eye is reported to be associated with several neurological diseases. The aim of this study is to evaluate the patients with hemiplegia after stroke for dry eye and compare their results with a control group.

Materials and methods: Forty-five patients with hemiplegia and 45 individuals as the control group were included in the study. Tear function tests (Schirmer and tear breakup time) and a dry eye questionnaire for dry eye symptoms (ocular surface disease index) were performed and the results of the two groups were compared.

Results: Schirmer test results were significantly lower in the post-stroke hemiplegia group compared to the control group (11.3 ± 8.2 mm and 20.6 ± 11.6 mm, respectively, p < .001). Tear breakup time results were significantly lower in the post-stroke hemiplegia group compared to the control group (7.9 ± 3.1 s and 12.1 ± 4.3 s, respectively, p < .001). Ocular surface disease index scores were not significantly different between hemiplegia and control groups (21.6 ± 20.0 and 19.8 ± 13.9, respectively, p = .635). Schirmer scores lower than 10 mm (60% and 30%, p < .001) and tear breakup time results lower than 10 s (65.6% and 28.9%, p < .001) were also higher in the hemiplegia group compared to control group.

Conclusion: We found lower Schirmer test and tear breakup time results and similar OSDI scores in hemiplegia patients compared to controls. Hemiplegia patients may have dry eye without typical symptoms. This should be taken into consideration in the follow-up and rehabilitation of post-stroke hemiplegia patients.  相似文献   
32.
33.
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   
34.
35.
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   
36.
37.
38.
39.
40.
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