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   1994篇
  免费   99篇
  国内免费   77篇
耳鼻咽喉   5篇
儿科学   119篇
妇产科学   32篇
基础医学   199篇
口腔科学   30篇
临床医学   229篇
内科学   508篇
皮肤病学   54篇
神经病学   84篇
特种医学   286篇
外科学   196篇
综合类   57篇
一般理论   3篇
预防医学   100篇
眼科学   45篇
药学   111篇
中国医学   6篇
肿瘤学   106篇
  2023年   16篇
  2022年   18篇
  2021年   45篇
  2020年   28篇
  2019年   33篇
  2018年   58篇
  2017年   35篇
  2016年   46篇
  2015年   44篇
  2014年   53篇
  2013年   46篇
  2012年   100篇
  2011年   89篇
  2010年   69篇
  2009年   81篇
  2008年   71篇
  2007年   95篇
  2006年   78篇
  2005年   60篇
  2004年   47篇
  2003年   36篇
  2002年   49篇
  2001年   33篇
  2000年   33篇
  1999年   20篇
  1998年   88篇
  1997年   73篇
  1996年   62篇
  1995年   62篇
  1994年   53篇
  1993年   49篇
  1992年   30篇
  1991年   23篇
  1990年   27篇
  1989年   48篇
  1988年   42篇
  1987年   34篇
  1986年   32篇
  1985年   28篇
  1984年   29篇
  1983年   16篇
  1982年   23篇
  1981年   17篇
  1980年   17篇
  1979年   17篇
  1978年   11篇
  1977年   19篇
  1976年   14篇
  1975年   18篇
  1972年   7篇
排序方式: 共有2170条查询结果,搜索用时 15 毫秒
1.
2.
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   
3.
We thank Drs Liu and Li for their interest in our randomizedtrial investigating the anti-arrhythmic effect of perindopriland losartan in the setting of lone paroxysmal atrial fibrillation(AF). While agreeing on modification of atrial remodelling asthe  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.
Skin ulceration in carpal tunnel syndrome is rare. A case report of a non-healing ulcer due to carpal tunnel with severe sensorimotor denervation is presented and discussed.  相似文献   
6.
7.
8.
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   
9.
10.
OBJECTIVES: Clinical trials and community-based studies often include the Center for Epidemiologic Studies-Depression scale (CES-D) as a measure of depression outcome. We compared responses to symptom-related items on the CES-D by depressed stroke and primary-care patients for several purposes: 1) to illustrate the use of Item Response Theory (IRT)-based (Rasch) models for comparing scale functioning across different patient subgroups; and 2) to inform clinicians and outcome researchers about scale functioning and depressive symptomatology in stroke- compared with primary care-based depression. METHODS: Two data sources were analyzed, including 32 depressed patients who were 3 months poststroke, and 366 depressed primary-care patients. Presence of depression was based on a CES-D score 16 or higher. Rasch models were used to assess item fit and compare item hierarchies between depressed primary-care and stroke patients. RESULTS: Item hierarchies were similar for poststroke depression and primary care-based depression. Interpersonal disruption items were the most difficult to endorse for both groups. No items misfit the scale in primary-care depression. Items relating to restless sleep, unfriendliness, and crying slightly misfit the scale in stroke patients, that is, may measure a different trait. Differential item functioning (DIF) between the groups was identified for items relating to appetite, restless sleep, crying, and feeling disliked. CONCLUSIONS: Results generally supported the use of the CES-D as measure of depression outcome, particularly in primary care-based depression. DIF may imply that slightly different clusters of depressive symptoms are reported by depressed stroke patients compared with primary care, but this is conjectural given the small stroke sample size and the same items have been previously associated with bias in studies of large nonstroke samples. This study found Rasch models to be useful tools to investigate scale performance for different clinical applications.  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