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   51841篇
  免费   3063篇
  国内免费   248篇
耳鼻咽喉   708篇
儿科学   1225篇
妇产科学   1267篇
基础医学   7168篇
口腔科学   1566篇
临床医学   5699篇
内科学   11107篇
皮肤病学   803篇
神经病学   5060篇
特种医学   1798篇
外科学   6428篇
综合类   329篇
一般理论   44篇
预防医学   3697篇
眼科学   816篇
药学   3515篇
  1篇
中国医学   59篇
肿瘤学   3862篇
  2023年   327篇
  2022年   633篇
  2021年   1149篇
  2020年   752篇
  2019年   995篇
  2018年   1204篇
  2017年   1086篇
  2016年   1264篇
  2015年   1326篇
  2014年   1758篇
  2013年   2544篇
  2012年   3831篇
  2011年   4016篇
  2010年   2389篇
  2009年   2181篇
  2008年   3340篇
  2007年   3647篇
  2006年   3243篇
  2005年   3297篇
  2004年   3033篇
  2003年   2828篇
  2002年   2589篇
  2001年   453篇
  2000年   377篇
  1999年   506篇
  1998年   568篇
  1997年   464篇
  1996年   413篇
  1995年   352篇
  1994年   314篇
  1993年   320篇
  1992年   256篇
  1991年   252篇
  1990年   232篇
  1989年   245篇
  1988年   220篇
  1987年   198篇
  1986年   192篇
  1985年   238篇
  1984年   203篇
  1983年   179篇
  1982年   201篇
  1981年   167篇
  1980年   148篇
  1979年   121篇
  1978年   139篇
  1977年   138篇
  1976年   100篇
  1975年   114篇
  1974年   91篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
31.
Deep brain stimulation of the subthalamic nucleus (STN-DBS) is an established therapy for Parkinson's disease (PD). A manic episode with psychotic symptoms induced by STN-DBS occurred in a previously psychiatrically healthy patient, focusing on the role of STN-DBS in influencing not only motor but also emotional behaviour.  相似文献   
32.
Forty-seven cases with anorexia nervosa (including a total population group) and 47 sex-, age-, and school-matched comparison cases were subjected to chromosome analyses in a blind fashion. No major abnormalities were found in any of the cases. Sex chromatin was analysed in buccal smears from the girls. No differences between the anorexia nervosa and the comparison cases were found. It seems that chromosomal/sex chromatin analyses in anorexia nervosa are not warranted.  相似文献   
33.
Background: For local anesthetics, the process of removal from the site of administration influences the duration of anesthesia and the risk for systemic toxicity to develop. The systemic absorption of epidural ropivacaine and the time profile of sensory and motor block were studied in healthy volunteers.

Methods: Nine persons simultaneously received 150 mg ropivacaine hydrochloride (7.5 mg/ml) epidurally and 40 mg deuterium-labeled (sup 2 H sub 3)ropivacaine hydrochloride (0.25 mg/ml) intravenously. Peripheral arterial and venous plasma samples were collected, and assessments of sensory and motor block were made.

Results: The arterial plasma concentrations increased faster than the venous concentrations, with 50% higher maximum concentrations after both intravenous and epidural administration. The absorption was biphasic. A correlation was seen between the duration of sensory block and the slower absorption half-life; that is, the longer the half-life, the longer the duration. The extent of spread varied among the volunteers, with the median upper block level not exceeding T12. The motor block (Bromage score 1) was of slower onset (median, 0.4 h) and of shorter duration (median, 4.1 h) than the sensory block (onset, 0.2 h; duration, 6.5 h at L2 medians).  相似文献   

34.
FIRST DIAGNOSIS OF SEVERE HANDICAP: A STUDY OF PARENTAL REACTIONS   总被引:2,自引:2,他引:0  
This paper reports the results of interviews with 190 parents of severely mentally handicapped children. Questions were asked about parents' satisfaction with the way they were first informed of the child's impairment. Most parents were informed by a doctor, and almost two-thirds were dissatisfied with the first information given. Satisfaction was associated with being told early in the child's life. There was a significant association between the time of telling and the diagnostic condition of the child: parents of children with handicap of no known pathology were more likely to be told during or after the second year of the child's life, while parents of children with Down's syndrome were most likely to be told at birth. The authors discuss ways in which parents can be helped through this difficult time and suggest procedures for breaking the news to parents in a sensitive way.  相似文献   
35.
36.
37.
38.
39.
Chronic renal failure triggered by calcineurin inhibitor (CNI)-based immunosuppression is a common complication after cardiac transplantation. Sirolimus and mycophenolate mofetil (MMF) are 2 newer immunosuppressive agents with no documented nephrotoxic side effects. This case report describes a patient with ongoing chronic renal failure 10 months after cardiac transplantation on cyclosporine-based immunosuppressive therapy. Conversion of the immunosuppressive regimen from cyclosporine to sirolimus and MMF resulted in freedom from acute rejection, excellent cardiac graft function and consistently improved renal function. This case illustrates the beneficial potential of sirolimus and MMF as CNI-free and safe long-term immunosuppression in a patient with chronic renal failure after heart transplantation.  相似文献   
40.
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