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   84094篇
  免费   6349篇
  国内免费   500篇
耳鼻咽喉   935篇
儿科学   2367篇
妇产科学   1193篇
基础医学   11446篇
口腔科学   904篇
临床医学   8937篇
内科学   17855篇
皮肤病学   941篇
神经病学   8192篇
特种医学   3173篇
外科学   13848篇
综合类   990篇
一般理论   91篇
预防医学   6396篇
眼科学   2008篇
药学   5675篇
中国医学   97篇
肿瘤学   5895篇
  2023年   683篇
  2022年   1067篇
  2021年   2471篇
  2020年   1380篇
  2019年   2264篇
  2018年   2608篇
  2017年   1852篇
  2016年   1954篇
  2015年   2279篇
  2014年   3285篇
  2013年   4189篇
  2012年   6701篇
  2011年   6965篇
  2010年   3783篇
  2009年   3351篇
  2008年   5625篇
  2007年   5831篇
  2006年   5453篇
  2005年   5378篇
  2004年   4876篇
  2003年   4447篇
  2002年   4066篇
  2001年   810篇
  2000年   596篇
  1999年   711篇
  1998年   864篇
  1997年   648篇
  1996年   543篇
  1995年   489篇
  1994年   438篇
  1993年   437篇
  1992年   374篇
  1991年   311篇
  1990年   278篇
  1989年   267篇
  1988年   251篇
  1987年   220篇
  1986年   198篇
  1985年   199篇
  1984年   242篇
  1983年   200篇
  1982年   272篇
  1981年   261篇
  1980年   188篇
  1979年   149篇
  1978年   158篇
  1977年   138篇
  1976年   96篇
  1975年   85篇
  1973年   79篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
62.
This case describes a rare complication of prostaglandin analogue eye drops used for treatment of primary open angle glaucoma. Though increase in the number, size and pigmentation of eyelashes is well‐known, this case shows extensive hair growth in malar region, which can be unacceptable. This complication can be one of the causes of discontinuation of prostaglandin analogue therapy.  相似文献   
63.
64.
65.
66.
In this study, the effect of combining anti-CD4 monoclonal antibody (mAb) and cyclosporin (CyA) therapy at the time of transplantation was examined. A mouse cardiac allograft model was used. Anti-CD4 mAb administered perioperatively induces long-term survival. The addition of a short course of CyA given subcutaneously in a regimen of either a high-dose treatment or a standard dose treatment to the anti-CD4 mAb treatment protocol did not have a detrimental effect on graft survival. Despite having no significant effect on graft survival, the addition of CyA to the treatment protocol did result in a significant decrease in the level of IL-2 present in the hearts 7 days after transplantation. The decrease in IL-2 production was directly related to the presence of CyA in vivo. When CyA treatment was continued throughout the period during which unresponsiveness to the graft is induced by anti-CD4 mAb therapy, 50 % of the grafted hearts were rejected once the CyA was discontinued. In conclusion, the combined use of anti-CD4 mAb therapy and CyA did not have a negative effect on graft survival in this model when the two agents were used concurrently at the time of transplantation. Received: 2 October 1996 Received after revision: 31 January 1997 Accepted: 5 February 1997  相似文献   
67.
68.
The epsilon-sarcoglycan gene (SGCE) on human chromosome 7q21 has been reported to be a major locus for inherited myoclonus-dystonia. Linkage to the SGCE locus has been detected in the majority of families tested, and mutations in the coding region have been found recently in families with autosomal dominant myoclonus-dystonia. To evaluate the relevance of SGCE in myoclonus-dystonia, we sequenced the entire coding region of the epsilon-sarcoglycan gene in 16 patients with either sporadic or familial myoclonus-dystonia. No mutations were found. This study suggests that epsilon-sarcoglycan does not play an important role in sporadic myoclonus-dystonia and supports genetic heterogeneity in familial cases.  相似文献   
69.
Study Objective . To determine the efficacy of high-dose ascorbate supplementation in lowering lipoprotein(a) [Lp(a)] levels in patients with premature coronary heart disease (CHD). Design . Randomized, double-blind, placebo-controlled trial. Setting . Outpatient clinic. Patients . Forty-four patients with documented premature CHD. defined as confirmed myocardial infarction and/or angiographically determined stenosis of 50% or greater in at least one major coronary artery before age 60 years. Interventions . Patients were block randomized on the basis of age, gender, and screening Lp(a) concentrations to receive ascorbate 4.5 g/day or placebo for 12 weeks. Measurements and Main Results . High-dose ascorbate was well tolerated and produced a marked elevation in mean plasma ascorbate levels (+1.2 mg/dl; p<0.001). Multiple linear regression analysis revealed no significant effect of supplementation on postintervention Lp(a) levels (p=0.39) in a model that included treatment group assignment, and baseline Lp(a) levels. Conclusions . Our findings do not support a clinically important lowering effect of high-dose ascorbate on plasma Lp(a) in patients with premature CHD.  相似文献   
70.
Due to recent public debate and newly imposed resident work hour restrictions, we decided to investigate the relationship of resident call status to their ambulatory patients' satisfaction. Resident continuity clinic patients were asked to rate their level of satisfaction on a 10-point Likert-type scale. Using multiple regression approaches, these data were then assessed as a function of resident call status. We found that in 646 patient encounters, patient satisfaction scores were significantly less when the resident was postcall, 8.99 ± 1.8, than when not postcall, 9.31 ± 1.3. We herein discuss etiologies and implications of these findings for both patient care and medical education.  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