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   2306篇
  免费   115篇
  国内免费   76篇
耳鼻咽喉   28篇
儿科学   107篇
妇产科学   49篇
基础医学   257篇
口腔科学   55篇
临床医学   217篇
内科学   576篇
皮肤病学   74篇
神经病学   114篇
特种医学   294篇
外科学   247篇
综合类   32篇
一般理论   1篇
预防医学   133篇
眼科学   39篇
药学   103篇
中国医学   4篇
肿瘤学   167篇
  2023年   15篇
  2022年   7篇
  2021年   34篇
  2020年   24篇
  2019年   45篇
  2018年   61篇
  2017年   35篇
  2016年   35篇
  2015年   41篇
  2014年   55篇
  2013年   68篇
  2012年   108篇
  2011年   108篇
  2010年   91篇
  2009年   124篇
  2008年   92篇
  2007年   120篇
  2006年   92篇
  2005年   82篇
  2004年   66篇
  2003年   65篇
  2002年   77篇
  2001年   78篇
  2000年   72篇
  1999年   48篇
  1998年   90篇
  1997年   83篇
  1996年   65篇
  1995年   58篇
  1994年   51篇
  1993年   45篇
  1992年   39篇
  1991年   35篇
  1990年   37篇
  1989年   47篇
  1988年   41篇
  1987年   36篇
  1986年   34篇
  1985年   29篇
  1984年   21篇
  1983年   16篇
  1982年   17篇
  1981年   10篇
  1980年   15篇
  1979年   10篇
  1978年   9篇
  1977年   18篇
  1976年   14篇
  1975年   16篇
  1972年   3篇
排序方式: 共有2497条查询结果,搜索用时 15 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.
ObjectiveThe objective of this study was to assess the causes of death and risk factors for mortality in a cohort of patients with severe chronic obstructive pulmonary disease (COPD).Patients and methodsWe studied 203 patients with severe COPD (forced expiratory volume in 1 second [FEV1] <50%), who were attended in our respiratory department day hospital (2001-2006). Clinical variables were recorded on inclusion, and clinical course and causes of death were retrospectively reviewed.ResultsThe mean (SD) age of patients was 69 (8) years and the mean FEV1 was 30.8% (8.2%). One-hundred and nine patients died (53.7%); death was attributed to respiratory causes in 72 (80.9%), with COPD exacerbation being the most frequent specific cause within this category (48.3%). During follow-up, 18.7% required admission to the intensive care unit (ICU). Survival at 1, 3, and 5 years was 80%, 53%, and 26%, respectively. The multivariate analysis showed that mortality was associated with age, stage IV classification according to the Global Initiative for Chronic Obstructive Lung Disease (GOLD), cor pulmonale, and hospital admission during the year prior to inclusion. Need for admission to the ICU during follow-up was a factor independently associated with higher mortality.ConclusionsMortality in patients with severe COPD was high and exacerbation of the disease was one of the most frequent causes of death. Age, GOLD stage, cor pulmonale, prior admission to hospital, and need for admission to the ICU during follow-up were independent predictors of mortality.  相似文献   
3.
4.
Carpal osteolysis: an unusual entity treated by renal transplantation   总被引:1,自引:0,他引:1  
P Ros  E Pelaez  N Gallego  J Corbatón  J Ortu?o 《Nephron》1990,55(4):434-435
  相似文献   
5.
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   
6.
7.
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