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   3090篇
  免费   202篇
  国内免费   80篇
耳鼻咽喉   6篇
儿科学   92篇
妇产科学   84篇
基础医学   408篇
口腔科学   40篇
临床医学   364篇
内科学   561篇
皮肤病学   47篇
神经病学   262篇
特种医学   321篇
外科学   382篇
综合类   119篇
一般理论   4篇
预防医学   334篇
眼科学   50篇
药学   178篇
中国医学   8篇
肿瘤学   112篇
  2023年   13篇
  2022年   22篇
  2021年   53篇
  2020年   33篇
  2019年   45篇
  2018年   46篇
  2017年   42篇
  2016年   40篇
  2015年   56篇
  2014年   77篇
  2013年   97篇
  2012年   113篇
  2011年   121篇
  2010年   97篇
  2009年   125篇
  2008年   127篇
  2007年   162篇
  2006年   132篇
  2005年   124篇
  2004年   121篇
  2003年   108篇
  2002年   111篇
  2001年   109篇
  2000年   113篇
  1999年   90篇
  1998年   111篇
  1997年   99篇
  1996年   86篇
  1995年   68篇
  1994年   57篇
  1993年   65篇
  1992年   71篇
  1991年   60篇
  1990年   57篇
  1989年   64篇
  1988年   68篇
  1987年   49篇
  1986年   45篇
  1985年   44篇
  1984年   29篇
  1983年   24篇
  1982年   22篇
  1981年   11篇
  1980年   15篇
  1979年   11篇
  1978年   12篇
  1977年   19篇
  1976年   17篇
  1975年   17篇
  1973年   7篇
排序方式: 共有3372条查询结果,搜索用时 375 毫秒
1.
We report the case of a patient with a 13-year history of pemphigus vulgaris (PV) treated with immunosuppressive agents, prednisone and mycophenolate mofetil who had developed lesions of Kaposi's sarcoma (KS) on a sole plaque of PV that had been previously treated with intralesional injections of steroids. The lesions were surgically removed and polymerase chain reaction (PCR) demonstrated human herpesvirus-8 (HHV-8) DNA. There were neither recurrences nor later dissemination of KS following gradual decrease of the immunosuppressive therapy. We suggest that the treatment with intralesional steroids may have influenced the local reactivation of a latent infection of the virus, determining the appearance of this localized KS.  相似文献   
2.
3.
Case history of a 54 yr old lady with acute viral hepatitis who developed cryptogenic organising pneumonitis. The patient was receiving corticosteroids at the time of onset of symptoms.  相似文献   
4.
1. The present study aimed to determine the feasibility of conducting a 5 year cardiovascular outcome trial of the treatment of 6000 elderly hypertensive patients in Australian general practices. 2. General practitioners (GPs) were invited to participate by mail and personal follow-up. Patient records were reviewed to identify subjects for a blood pressure (BP) screening programme. Blood pressure was measured on three occasions and eligible subjects were included if the average BP was 160 mmHg systolic or 90 mmHg diastolic if systolic BP was 140 mmHg. 3. Seven hundred and forty-one GPs were approached and 89 were enrolled in the study (12% of mail invites and 75% of those receiving a personal contact). In 16 practices where screening was completed, 82 000 records were reviewed to identify 4% patients eligible for screening. Twenty-two per cent of eligible subjects attended screening. Of 1938 subjects screened, 180 (9%) had BP 5=160/90 mmHg. Forty-seven percent of subjects (n = 916) were receiving antihypertensive therapy and 184 (20%) were withdrawn from therapy. One hundred and sixteen (63%) of these subjects had BP return to study entry levels within 6 weeks. Fifty-seven newly diagnosed and 81 previously treated subjects were randomized (7% of the screened population). 4. Based on the high participation rate of GPs, the response rate of patients to attend a BP screening programme and the 7% randomization to screening ratio for entry into the study, the ANBP2 pilot study has demonstrated that it is feasible to recruit subjects from Australian general practices to a cardiovascular outcome trial.  相似文献   
5.
6.
本文采用小鼠精子试验和小鼠睾丸DNA合成抑制试验,检测了JX-1对雄性生殖细胞的致突变作用。实验结果表明JX-1对小鼠精子总数、精子活动率及精子畸形率均无统计学意义的增加,与小鼠睾丸DNA合成抑制试验阴性反应一致。作者认为JX-1对雄性生殖细胞为一种非诱变剂。  相似文献   
7.
Limbal xanthogranuloma   总被引:3,自引:0,他引:3  
Three cases of histologically proven limbal xanthogranuloma are presented. All three cases presented with a yellow raised swelling at the limbus and no other ocular or systemic abnormality. A simple excision of the lesion was carried out in all cases and histological examination revealed features typical of xanthogranuloma. Two patients had a recurrence at the original site, necessitating keratectomy, with insertion of a lamellar graft. We suggest that a primary keratectomy with insertion of a lamellar graft should be performed in cases of limbal xanthogranuloma in order to lessen the risk of recurrence and to provide a better cosmetic result.  相似文献   
8.
9.
SUMMARY A young patient presenting with splenomegaly and hypersplenism was inadvertently found to have selective IgA deficiency. There were no symptoms of immunodeficiency and the patient responded well to splenectomy, with return of blood counts to normal without adverse effects. No other cause for the hypersplenism was found. We postulate selective IgA deficiency as a cause of splenomegaly and hypersplenism.  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