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   2347365篇
  免费   175090篇
  国内免费   3321篇
耳鼻咽喉   32055篇
儿科学   75908篇
妇产科学   62696篇
基础医学   348478篇
口腔科学   63625篇
临床医学   211414篇
内科学   457392篇
皮肤病学   51785篇
神经病学   185326篇
特种医学   88043篇
外国民族医学   489篇
外科学   353978篇
综合类   47509篇
现状与发展   12篇
一般理论   849篇
预防医学   182772篇
眼科学   54373篇
药学   175154篇
  11篇
中国医学   4575篇
肿瘤学   129332篇
  2021年   18994篇
  2019年   19550篇
  2018年   27069篇
  2017年   20371篇
  2016年   22756篇
  2015年   25658篇
  2014年   36119篇
  2013年   53968篇
  2012年   74713篇
  2011年   79455篇
  2010年   47079篇
  2009年   44582篇
  2008年   74643篇
  2007年   79508篇
  2006年   80321篇
  2005年   77833篇
  2004年   74397篇
  2003年   71731篇
  2002年   69389篇
  2001年   108766篇
  2000年   111502篇
  1999年   93520篇
  1998年   27002篇
  1997年   23664篇
  1996年   24065篇
  1995年   22721篇
  1994年   20901篇
  1993年   19723篇
  1992年   72027篇
  1991年   70102篇
  1990年   68428篇
  1989年   65689篇
  1988年   60332篇
  1987年   59163篇
  1986年   55253篇
  1985年   53027篇
  1984年   39325篇
  1983年   33408篇
  1982年   19870篇
  1979年   35878篇
  1978年   25656篇
  1977年   21241篇
  1976年   20334篇
  1975年   21822篇
  1974年   26164篇
  1973年   24810篇
  1972年   23208篇
  1971年   22044篇
  1970年   20256篇
  1969年   19317篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.
23.
Maternal and Child Health Journal - Early life exposures can have an impact on a child’s developmental trajectory and children born late preterm (34–36 weeks gestational age)...  相似文献   
24.
Troppmair  Teresa  Egger  J.  Krösbacher  A.  Zanvettor  A.  Schinnerl  A.  Neumayr  A.  Baubin  M. 《Der Anaesthesist》2022,71(4):272-280
Die Anaesthesiologie - Die Qualität eines Rettungssystems zeichnet sich auch durch den effizienten Einsatz seiner personellen und Fahrzeugressourcen aus. So können im berechtigten Fall...  相似文献   
25.
26.
27.
28.
MicroRNAs (miRNAs) play important roles in prostate cancer development. However, it remains unclear how individual miRNAs contribute to the initiation and progression of prostate cancer. Here we show that a basal layer‐enriched miRNA is required for prostate tumorigenesis. We identify miR‐205 as the most highly expressed miRNA and enriched in the basal cells of the prostate. Although miR‐205 is not required for normal prostate development and homeostasis, genetic deletion of miR‐205 in a Pten null tumor model significantly compromises tumor progression and does not promote metastasis. In Pten null basal cells, loss of miR‐205 attenuates pAkt levels and promotes cellular senescence. Furthermore, although overexpression of miR‐205 in prostate cancer cells with luminal phenotypes inhibits cell growth in both human and mouse, miR‐205 has a minimal effect on the growth of a normal human prostate cell line. Taken together, we have provided genetic evidence for a requirement of miR‐205 in the progression of Pten null‐induced prostate cancer.  相似文献   
29.
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   
30.
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