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   46551篇
  免费   2771篇
  国内免费   114篇
耳鼻咽喉   677篇
儿科学   2102篇
妇产科学   1107篇
基础医学   5719篇
口腔科学   1939篇
临床医学   4437篇
内科学   9510篇
皮肤病学   1144篇
神经病学   3875篇
特种医学   1418篇
外国民族医学   2篇
外科学   7176篇
综合类   169篇
一般理论   17篇
预防医学   3076篇
眼科学   1322篇
药学   3022篇
中国医学   184篇
肿瘤学   2540篇
  2023年   354篇
  2022年   324篇
  2021年   834篇
  2020年   567篇
  2019年   889篇
  2018年   1390篇
  2017年   996篇
  2016年   1112篇
  2015年   1127篇
  2014年   1403篇
  2013年   2113篇
  2012年   3276篇
  2011年   3683篇
  2010年   1923篇
  2009年   1407篇
  2008年   3130篇
  2007年   3366篇
  2006年   3256篇
  2005年   3305篇
  2004年   3171篇
  2003年   2919篇
  2002年   2807篇
  2001年   924篇
  2000年   1010篇
  1999年   667篇
  1998年   395篇
  1997年   324篇
  1996年   259篇
  1995年   231篇
  1994年   197篇
  1993年   180篇
  1992年   156篇
  1991年   134篇
  1990年   132篇
  1989年   118篇
  1988年   100篇
  1987年   91篇
  1986年   101篇
  1985年   71篇
  1984年   84篇
  1983年   74篇
  1982年   71篇
  1981年   54篇
  1980年   64篇
  1979年   76篇
  1978年   61篇
  1977年   53篇
  1976年   46篇
  1974年   46篇
  1973年   48篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
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   
2.
3.
4.
European Radiology - The strongest adverse prognostic factor in myxoid/round cell liposarcomas (MRC-LPS) is the presence of a round cell component above 5% within the tumor bulk. Its identification...  相似文献   
5.
Recent years have brought an enhanced understanding of keratinocyte contribution to cutaneous nociception. While intra‐epidermal nerve endings were classically considered as the exclusive transducers of cutaneous noxious stimuli, it has now been demonstrated that epidermal keratinocytes can initiate nociceptive responses, like Merkel cells do for the innocuous mechanotransduction. In the light of recent in vivo findings, this article outlines this paradigm shift that points to a not yet considered population of sensory epidermal cells.  相似文献   
6.
7.
8.
9.
10.
Magnetic resonance elastography aims to non-invasively and remotely characterize the mechanical properties of living tissues. To quantitatively and regionally map the shear viscoelastic moduli in vivo, the technique must achieve proper mechanical excitation throughout the targeted tissues. Although it is straightforward, ante manibus, in close organs such as the liver or the breast, which practitioners clinically palpate already, it is somewhat fortunately highly challenging to trick the natural protective barriers of remote organs such as the brain. So far, mechanical waves have been induced in the latter by shaking the surrounding cranial bones. Here, the skull was circumvented by guiding pressure waves inside the subject's buccal cavity so mechanical waves could propagate from within through the brainstem up to the brain. Repeatable, reproducible and robust displacement fields were recorded in phantoms and in vivo by magnetic resonance elastography with guided pressure waves such that quantitative mechanical outcomes were extracted in the human brain.  相似文献   
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