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   274443篇
  免费   25186篇
  国内免费   19205篇
耳鼻咽喉   2080篇
儿科学   2361篇
妇产科学   3024篇
基础医学   33736篇
口腔科学   4405篇
临床医学   39112篇
内科学   39610篇
皮肤病学   2477篇
神经病学   15662篇
特种医学   9707篇
外国民族医学   198篇
外科学   26601篇
综合类   44702篇
现状与发展   74篇
一般理论   27篇
预防医学   16221篇
眼科学   8424篇
药学   28791篇
  384篇
中国医学   16153篇
肿瘤学   25085篇
  2025年   238篇
  2024年   4974篇
  2023年   6026篇
  2022年   11892篇
  2021年   15174篇
  2020年   11593篇
  2019年   9969篇
  2018年   9748篇
  2017年   8674篇
  2016年   8244篇
  2015年   12257篇
  2014年   15053篇
  2013年   12594篇
  2012年   18832篇
  2011年   21567篇
  2010年   13052篇
  2009年   10088篇
  2008年   13360篇
  2007年   13395篇
  2006年   13622篇
  2005年   13888篇
  2004年   8231篇
  2003年   7631篇
  2002年   6415篇
  2001年   5716篇
  2000年   6433篇
  1999年   7176篇
  1998年   4737篇
  1997年   4760篇
  1996年   3681篇
  1995年   3519篇
  1994年   2899篇
  1993年   1963篇
  1992年   2217篇
  1991年   1844篇
  1990年   1567篇
  1989年   1339篇
  1988年   1134篇
  1987年   993篇
  1986年   748篇
  1985年   609篇
  1984年   349篇
  1983年   214篇
  1982年   115篇
  1981年   126篇
  1980年   85篇
  1979年   91篇
  1965年   1篇
  1962年   1篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
张虹 《护理研究》2006,20(5):1353-1353
周围性面神经麻痹称之面瘫,以口眼向一侧歪斜为主症,俗称口眼歪斜。本病如果治疗不及时或治疗不当,则久治不愈,给病人造成极大痛苦。若单用针刺治疗疗程较长,疗效不显著。我科在运用针灸按摩治疗本病的同时,对病人实施了针对性的全面的护理措施。现介绍如下。  相似文献   
72.
73.
74.
On this report 461 matched cases of mental retardation of unknown aetiology were analysed on the relationship between the diseases and the parents age, birth orders with conditional Logistic regression. These cases were accurately diagnosed and selected from the Epidemiologic Survey of genetic diseases of Sichuan, China. The results found that mental retardation of unknown aetiology is related to the age of parents and birth order. The paternal age is the main factor while the maternal age in not a significant effect and birth order also in not a significant effect after readjusting the other factors. Compared to paternal age group of under 25. There are significant increase of relative risks of age group 30-34 and 45 above, about 1.8 and 2.7 fold increase in univariate analysis and 1.9 and 3.3 fold increase in controlling the maternal age and birth order, a chi-square test for trend of distribution of paternal age also indicates a significant dose response relationship between increasing risk with age. The significance of result and methods of analysis were discussed.  相似文献   
75.
作为一名从事妇产科工作多年的老同志,想借此机会和年轻的同志、同行们谈谈心。  相似文献   
76.
预测哪些人可能因急性发病而需要急诊入院,已成为英国国家医疗卫生服务体系(NHS)的一个重要话题。卫生部门将那些患有复杂的慢性疾病,经常不定期地去二级医疗机构就医的人们视为高危人群。确定这些人之后,社区护理员或其他卫生人员将通过“个案管理”的方法照顾他们。“个案管理”此前被定义为“对疾病尚未控制或所需费用昂贵的患者进行加强医疗计划”。社区护理人员可来自任何护理部门,但一般认为社区护士更能胜任这一角色。此方法能够减少可避免的急诊入院患者数量,并有助于实现到2008年3月减少5%急诊住院床位日的公共医疗服务目标。但是,如何才能界定需要急诊入院的高危人群呢?  相似文献   
77.
To determine whether cardiac hypertrophy secondary to chronic renovascular hypertension is associated with altered in vivo myocardial metabolism, phosphorus-31 nuclear magnetic resonance saturation transfer techniques were used to study creatine kinase (CK) kinetics in six chronically hypertensive dogs with moderate cardiac hypertrophy and eight control dogs. The forward rate constant of CK and the flux of phosphocreatine to adenosine triphosphate were determined in both groups of dogs before and during norepinephrine administration (1 microgram/kg per min), used to increase heart rate x systolic blood pressure (rate-pressure product), cardiac output and oxygen consumption. Baseline and norepinephrine-induced changes in rate-pressure product, cardiac output and oxygen consumption were similar in both groups of dogs, as were baseline forward rate constant and flux of phosphocreatine to adenosine triphosphate. However, the norepinephrine-induced changes in forward rate constant and flux were significantly less in hypertensive than in control dogs (p less than 0.05) even though changes in hemodynamic and functional variables were similar in both groups. These data demonstrate that moderate myocardial hypertrophy is associated with altered CK kinetics, which do not appear to affect the heart's ability for global mechanical recruitment at this stage in the hypertensive process. It is possible that the changes in myocardial enzyme kinetics may contribute to diastolic dysfunction previously reported in this model and may be a precursor for ultimate development of heart failure if hypertension is maintained for prolonged periods.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   
78.
Summary Reported in this paper is the first case of isolation ofPseudalle-Scheria boydii from cerebral spinal fluid of a boy with meningitis in China. Morphology and culture were observed by light microscopy, electron scanning microscopy and transmission electron microscopy. In addition, mycelium antigen prepared by SDS-PAGE was compared with that of the other strain of Scedosporium apiospermum. Both of the strains showed more than 40 peptide lines. Their molecular weight was very similar. On the CS-930 Dual-Wavelength TLC Scanner the peaks of both antigens showed to lie in nearly the same position. It could be concluded thatPseudallescheria boydii andScedosporium apiospermum belong to the same genus, but they are of different strains and reproductive phases.  相似文献   
79.
80.
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