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   210807篇
  免费   12630篇
  国内免费   503篇
耳鼻咽喉   2868篇
儿科学   7372篇
妇产科学   4602篇
基础医学   28104篇
口腔科学   9375篇
临床医学   16028篇
内科学   46609篇
皮肤病学   5453篇
神经病学   17579篇
特种医学   6599篇
外国民族医学   26篇
外科学   27381篇
综合类   1524篇
现状与发展   1篇
一般理论   80篇
预防医学   20317篇
眼科学   4246篇
药学   13011篇
中国医学   862篇
肿瘤学   11903篇
  2023年   1136篇
  2022年   2186篇
  2021年   4435篇
  2020年   2942篇
  2019年   4219篇
  2018年   6112篇
  2017年   4526篇
  2016年   4406篇
  2015年   4960篇
  2014年   6561篇
  2013年   8693篇
  2012年   13535篇
  2011年   14539篇
  2010年   7215篇
  2009年   6135篇
  2008年   11499篇
  2007年   12320篇
  2006年   11563篇
  2005年   11864篇
  2004年   11197篇
  2003年   10261篇
  2002年   8169篇
  2001年   5762篇
  2000年   5883篇
  1999年   4903篇
  1998年   1768篇
  1997年   1483篇
  1996年   1442篇
  1995年   1214篇
  1994年   1189篇
  1993年   1087篇
  1992年   2744篇
  1991年   2636篇
  1990年   2414篇
  1989年   2396篇
  1988年   2167篇
  1987年   1996篇
  1986年   1870篇
  1985年   1796篇
  1984年   1306篇
  1983年   1053篇
  1982年   613篇
  1981年   551篇
  1980年   528篇
  1979年   953篇
  1978年   629篇
  1977年   509篇
  1975年   557篇
  1974年   555篇
  1973年   561篇
排序方式: 共有10000条查询结果,搜索用时 140 毫秒
1.
2.
3.
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   
4.
5.
6.
Neorickettsia helminthoeca (NH), the agent of salmon poisoning disease or canine neorickettiosis (CN), is a bacterial endosymbiont of the nematode Nanophyetus salmincola, and infections are spreading among specific fish‐eating mammalians. This article describes the pathologic and immunohistochemical findings associated with spontaneous NH‐induced infections in dogs from Southern Brazil. The principal pathologic findings were hypertrophy of Peyer patches and lymphadenopathy with lymphocytic proliferation, chronic interstitial pneumonia, and chronic enteritis associated with positive intralesional immunoreactivity to antigens of NH within macrophages and histiocytes. Positive immunoreactivity against canine parvovirus‐2 (CPV‐2) or/and canine distemper virus was not detected in the evaluated intestinal segments or in the samples from the cerebellum and lungs, respectively, from the dogs evaluated. These findings demonstrated that NH was involved in the enteric, pulmonary, and lymphoid lesions herein described, and provide additional information to confirm the occurrence of this bacterial endosymbiont within this geographical location. It is proposed that chronic pneumonia should be considered as a pathologic manifestation of NH‐induced infections. Additionally, our results show that the occurrences of CN seem to be underdiagnosed in Southern Brazil due to the confusion with the incidence of CPV‐2.  相似文献   
7.
8.
9.
Depigmented lesions may occur as postinflammatory sequelae of subacute cutaneous lupus erythematosus (SCLE), leading to great psychosocial impact. A 53‐year‐old male patient presented with post‐SCLE depigmented facial lesions after five years of disease stability. We proposed surgical treatment with melanocyte‐keratinocyte transplantation procedure (MKTP), and after five months the patient achieved 90% repigmentation, without Koebner phenomenon (KP). In theory, KP is a possible complication of MKTP procedure since the preparation of the receptor area involves the use of dermabrasion. In an attempt to avoid it, we suggest to maintain the treatment of the underlying disease and wait for a minimum period of disease stability before the procedure.  相似文献   
10.
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