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   40754篇
  免费   2066篇
  国内免费   203篇
耳鼻咽喉   475篇
儿科学   717篇
妇产科学   629篇
基础医学   5378篇
口腔科学   1252篇
临床医学   3016篇
内科学   9935篇
皮肤病学   991篇
神经病学   2900篇
特种医学   1630篇
外科学   6783篇
综合类   238篇
一般理论   2篇
预防医学   1228篇
眼科学   732篇
药学   2760篇
中国医学   63篇
肿瘤学   4294篇
  2021年   822篇
  2020年   395篇
  2019年   576篇
  2018年   796篇
  2017年   583篇
  2016年   681篇
  2015年   807篇
  2014年   1031篇
  2013年   1156篇
  2012年   1835篇
  2011年   2023篇
  2010年   1146篇
  2009年   1022篇
  2008年   1832篇
  2007年   1939篇
  2006年   1957篇
  2005年   2006篇
  2004年   2007篇
  2003年   1926篇
  2002年   1908篇
  2001年   1303篇
  2000年   1443篇
  1999年   1291篇
  1998年   497篇
  1997年   377篇
  1996年   382篇
  1995年   344篇
  1994年   310篇
  1993年   308篇
  1992年   840篇
  1991年   792篇
  1990年   705篇
  1989年   724篇
  1988年   694篇
  1987年   688篇
  1986年   683篇
  1985年   604篇
  1984年   444篇
  1983年   364篇
  1979年   341篇
  1978年   236篇
  1977年   206篇
  1975年   201篇
  1974年   231篇
  1973年   207篇
  1972年   199篇
  1971年   210篇
  1970年   204篇
  1969年   225篇
  1968年   175篇
排序方式: 共有10000条查询结果,搜索用时 25 毫秒
1.
2.
3.
Finasteride is standard medical treatment for androgenetic alopecia; however, no large studies with 5 years or more of follow up have been performed in Japan. The authors followed Japanese men with androgenetic alopecia treated with finasteride for 5 years to evaluate long‐term treatment efficacy. Of 903 men treated with finasteride (1 mg/day), 801 patients were evaluated over 5 years by modified global photographic assessment. Although the proportion of improvement was high (99.4%), modified global photographic assessment scores after 5 years of treatment were lower in patients with more advanced disease as measured by the modified Norwood–Hamilton scale. After separating patients into “sufficient” and “insufficient” efficacy groups according to the modified global photographic assessment score after 5 years (scores ≥6 and <6, respectively), multivariate analysis showed that independent risk factors of insufficient efficacy were age at start of treatment of 40 years or more (P = 0.021) and classification on the modified Norwood–Hamilton scale (P < 0.001), whereas presence of stress at start of treatment was a negative predictor (P = 0.025). In conclusion, continuous finasteride treatment for 5 years improved androgenetic alopecia with sustained effect among Japanese. Younger age and less advanced disease at start of treatment were the key predictors of higher finasteride efficacy.  相似文献   
4.
5.
6.
Eosinophilic dermatosis of hematological malignancy is a paraneoplastic skin eruption associated with chronic lymphocytic leukemia and other B‐cell malignancies. It clinically resembles an insect bite reaction and it can precede the symptoms of the hematological malignancy or be related to a more aggressive course. Different treatments have been proposed, but partial response and recurrence are frequent. Herein, we describe a case of eosinophilic dermatosis associated with mantle cell lymphoma with remission after lenalidomide therapy.  相似文献   
7.
8.
9.
Background and Aims: Video capsule endoscopy (VCE) has become increasingly important as a simple method for observing the entire small intestine. The indications for VCE are obscure gastrointestinal bleeding and investigation of Crohn’s disease (CD). However, the correlation between endoscopic findings obtained by VCE and clinical findings in known cases of CD is not clear, and we therefore investigated this in the present study. Patients and methods: In 30 patients with known CD (Crohn’s disease activity index [CDAI] 0–420; median = 158.3), double contrast enteroclysis (ENT) was performed 1–3 weeks prior to VCE. The relationship between the VCE findings and hematological analysis/CDAI was examined. Results: In 17 of 30 patients, the entire small intestine could be investigated by VCE, whereas in the remaining 13 patients the terminal ileum could not be investigated. The following exhibited positive correlations: total lesions and CDAI (correlation coefficient values: rs = 0.661, adjusted P < 0.0061), ulcers and C‐reactive protein (CRP) (rs = 0.607, adjusted P < 0.0061), total lesions and CRP (rs = 0.604, adjusted P < 0.0061). Conclusions: Analysis with VCE suggests that CDAI and CRP indicate the activity of intestinal lesions in patients with known CD, and that CRP, in particular, is associated with the activity of ulcerative lesions of the intestine. This may contribute to revised guidelines for VCE in the future.  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