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   360篇
  免费   7篇
耳鼻咽喉   7篇
儿科学   12篇
妇产科学   17篇
基础医学   25篇
口腔科学   5篇
临床医学   58篇
内科学   56篇
皮肤病学   5篇
神经病学   17篇
特种医学   12篇
外科学   34篇
综合类   24篇
一般理论   2篇
预防医学   31篇
眼科学   4篇
药学   34篇
肿瘤学   24篇
  2014年   3篇
  2013年   3篇
  2009年   3篇
  1999年   4篇
  1998年   4篇
  1997年   6篇
  1996年   15篇
  1995年   9篇
  1994年   9篇
  1993年   10篇
  1992年   6篇
  1991年   4篇
  1989年   3篇
  1988年   5篇
  1987年   4篇
  1986年   3篇
  1985年   3篇
  1984年   6篇
  1983年   2篇
  1982年   2篇
  1981年   5篇
  1980年   4篇
  1979年   3篇
  1978年   3篇
  1977年   3篇
  1976年   2篇
  1975年   2篇
  1974年   3篇
  1972年   2篇
  1970年   1篇
  1968年   3篇
  1966年   1篇
  1965年   2篇
  1964年   1篇
  1963年   4篇
  1962年   2篇
  1961年   3篇
  1960年   2篇
  1959年   30篇
  1958年   29篇
  1957年   23篇
  1956年   27篇
  1955年   34篇
  1954年   33篇
  1953年   1篇
  1951年   1篇
  1949年   7篇
  1948年   20篇
  1947年   1篇
  1946年   2篇
排序方式: 共有367条查询结果,搜索用时 15 毫秒
71.
This paper describes some of the background characteristics and sexually abusive behaviour of 100 British sexually abusive male adolescents aged between 11 and 18 years. A retrospective file review and clinical assessment provided relevant information on all subjects who had a documented history of sexual assault or abuse against others. Subjects came from a variety of sources including residential child care centres, secure facilities and an adolescent psychiatry outpatient clinic. Demographic characteristics and abuser characteristics are described, including the family environment, history of involvement with health and social services, school adjustment and performance, history of non-sexual antisocial behaviour, and also the adolescents’ own prior experiences of physical and sexual abuse. Abuse and victim characteristics are also described, including duration of abusive behaviour, types of sexually abusive behaviour exhibited, sex offence convictions, method of overcoming victim resistance, location where abuse took place, sex and age of victims, and abuser—victim relationship. These abuser and abuse characteristics were found to be consistent with those described in the North American literature. The implications of these findings are discussed in relation to the aetiology, management and treatment of sexually abusive behaviour in British adolescents.  相似文献   
72.
Single and dual port versions of the keyed fillers fitted toTEC4 and TEC3 vaporizers, respectively, were examined. The singleport filler performed satisfactorily, provided that it was correctlyused and properly maintained. Design deficiencies in the dual-portkeyed filler were found which accounted for many of the problemsdescribed by users. The keyed bottle adaptor could be improvedby an increase in its length and the provision of two openingsinto the outer tube at the bottle ends.  相似文献   
73.
Summary. Gamete intrafallopian transfer (GIFT) was applied in 207 treatment cycles in 73 couples. The pregnancy rate in cycles with only one (2/21, 9·5%) or two (2/29, 6·9%) oocytes transferred was significantly less than that in which four oocytes (36/116, 31·0%) were replaced. The collection of more than four oocytes did not influence the pregnancy rate in that treatment cycle. The overall pregnancy rate was 24·2% (50 of 207) and was similar in the four infertility groups studied (non-occlusive tubal disorders, endometriosis, cervical factor and unexplained infertility) with 28 (56%) of the pregnancies delivered at 20 weeks. The pregnancy wastage included 4 (8%) ectopic pregnancies and 3 (6%) late pregnancy losses. The 12 multiple pregnancies occurred following the transfer of three and four oocytes.  相似文献   
74.
Intracranial haemorrhage is a common complication of haemophilia, occurring in 2–8% of sufferers [1]. Half of the cases give a history of trauma and despite developments in the management of acute bleeding the condition still carries a mortality of approximately 30% [2]. Surgery may be required, most commonly for evacuation of a subdural haematoma which carries a mortality of up to 40% [3]. We present the case of a 17-year-old haemophiliac with a traumatic subdural haemorrhage, who was treated with a continuous intravenous infusion of factor VIII and made a complete recovery without recourse to surgery. We have found no reference in the world literature of such treatment for acute subdural haemorrhage in a haemophiliac.  相似文献   
75.
76.
Seventy-six patients underwent parathyroidectomy for renal hyperparathyroidism.There were 10 subtotal parathyroidectomies, 49 total parathyroidectomieswith implantation of part of one gland as an autograft, ninetotal parathyroidectomies with no autograft, and eight patientsin whom only three parathyroid glands were found. In 34 dialysis patients who underwent total parathyroidectomywith an autograft there was a high rate of recurrent hyperparathyroidismafter 6 years in those remaining on dialysis. Fifty per centhad asymptomatic recurrent hyperparathyodism and 30 per centrequired partial autograft excision for symptomatic hyperparathyroidism.In contrast, recurrent hyperparathyroidism was rare in renaltransplant recipients with good renal function. This favourableoutcome did not depend upon whether parathyroid surgery wasperformed before or after transplantation, or on the type ofparathyroidectomy. Total parathyroidectomy without an autograftwas performed in nine dialysis patients without any short-termadverse effects, and with clinical and pathological improvementin bone disease. In summary, the results of surgery for renal hyperparathyroidismwere excellent in patients who received a successful renal transplant.However, there was a high incidence of recurrent hyperparathyroidismin patients who remained on long-term dialysis. Total parathyroidectomywithout an autograft may be the treatment of choice in patientsunlikely to receive a renal transplant.  相似文献   
77.
78.
79.
80.
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