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   693篇
  免费   48篇
  国内免费   5篇
儿科学   33篇
妇产科学   5篇
基础医学   84篇
口腔科学   17篇
临床医学   62篇
内科学   125篇
皮肤病学   16篇
神经病学   26篇
特种医学   180篇
外科学   67篇
综合类   38篇
预防医学   41篇
眼科学   9篇
药学   26篇
中国医学   1篇
肿瘤学   16篇
  2022年   8篇
  2019年   6篇
  2018年   8篇
  2015年   14篇
  2014年   5篇
  2013年   19篇
  2012年   20篇
  2011年   18篇
  2010年   18篇
  2009年   20篇
  2008年   19篇
  2007年   19篇
  2006年   14篇
  2005年   20篇
  2004年   14篇
  2003年   18篇
  2002年   20篇
  2001年   20篇
  2000年   16篇
  1999年   11篇
  1998年   20篇
  1997年   42篇
  1996年   27篇
  1995年   21篇
  1994年   15篇
  1993年   15篇
  1992年   8篇
  1991年   7篇
  1990年   10篇
  1989年   9篇
  1988年   16篇
  1987年   22篇
  1986年   22篇
  1985年   15篇
  1984年   13篇
  1983年   10篇
  1982年   12篇
  1981年   15篇
  1980年   16篇
  1979年   5篇
  1978年   7篇
  1977年   8篇
  1976年   9篇
  1975年   5篇
  1971年   6篇
  1970年   7篇
  1969年   7篇
  1968年   10篇
  1967年   7篇
  1966年   6篇
排序方式: 共有746条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
Purpose: The purposes of this survey were to identify the current participation in Continuing Professional Development (CPD) of radiographers in the South and West Regional Health Authority (SWRHA), and to invite them to comment on issues related to CPD activities.Methods: A questionnaire was sent to 1686 diagnostic and therapy radiographers in the SWRHA. This was designed to gain a profile of those radiographers currently practising and their participation in, and comments on, CPD activities.Results: A response rate of 51% was achieved, although only 634 questionnaires were used for the final analysis. The population of radiographers who responded were predominantly diagnostic, in the age range 26–45 years, female and employed on a full-time basis. Most respondents did not hold any post-registration qualifications, and only 149 respondents were involved in formal studies. Most respondents were involved in statutory CPD activities such as resuscitation and manual lifting, and fewer, although a majority, were involved in activities associated with changing roles and developing new competencies. Other CPD activities which respondents considered as benefiting their professional role were wide ranging. Most of the issues raised concerning CPD related to provision, support and funding.Conclusions: The challenge for the future is to develop a coherent, progressive and affordable scheme of CPD to meet the needs of individual radiographers, the health services, the patient and the profession.  相似文献   
6.
Cholecystokinin-decreased food intake in rhesus monkeys   总被引:1,自引:0,他引:1  
  相似文献   
7.
This study analyses the influence of female and male patient age and human menopausal gonadotrophin (HMG) requirements on clinical pregnancy rates and live birth rates with ovulation stimulation using HMG in combination with intrauterine insemination (IUI). In this study, 363 consecutive HMG/IUI treatment cycles in 184 patients carried out at a university fertility centre were analysed in a retrospective fashion. The main outcomes measured were clinical pregnancy rates and live birth rates. Increased female partner age (> or = 35) and male partner age (> or = 40) were found to negatively influence pregnancy rates with HMG/ IUI therapy. In addition, this study demonstrated a critical threshold of HMG requirements beyond which pregnancy did not occur. No pregnancies occurred in treatment cycles requiring > 25 ampoules (1875 IU) of menotrophins to achieve follicular maturity, irrespective of patient age. In conclusion, female partner age, male partner age, and HMG requirements all significantly influence pregnancy rates with HMG/IUI therapy.   相似文献   
8.
INTRODUCTION: Core biopsy of the breast has become the method of choice for tissue diagnosis of screen detected microcalcifications and some mass lesions in many breast assessment centres. Biopsy results are not available until the following day. Imprint cytology of fresh breast core samples allows same-day reporting and patient counselling.
AIM: To determine the accuracy of core imprint cytology when compared with core biopsy diagnosis when used in a breast assessment centre setting.
METHODS: Core imprints (CI) were prepared and reported on all fresh core biopsies (CB) performed at the Sir Charles Gairdner Hospital Breast Centre from May to December 2000. Fresh core samples were placed on a glass microscope slide. Core radiographs were taken for microcalcification lesions (MC). A laboratory technician gently and quickly rolled the cores on the slide with fine forceps. The cores were fixed in formalin, processed and reported next day. The imprint slide was air dried and stained with DiffQuik. CI were reported using four categories: Insufficient, Benign, Indeterminate and Malignant. Counselling and planning for management were possible on the same day in women with malignant diagnoses. Clinicians were advised not to discuss negative or indeterminate CI results with women and to defer to the final CB report.
RESULTS: Cores were performed on 381 lesions. There were 83 carcinomas (38 in MC and 45 in masses) and 56 were called malignant on CI (absolute sensitivity 67.5%; 78.9% for MC and 57.8% for masses). 3 malignancies on CB were negative on CI giving a false negative rate of 3.6%. There were no false positive diagnoses. The predictive value of a benign diagnosis was 95.3%. There were no adverse effects in the histology of CB.
CONCLUSION: CI was an accurate method of providing an immediate diagnosis of malignancy in two thirds of malignancies confirmed on CB.  相似文献   
9.
10.
Adrenergic mechanisms in cerebral circulation of the goat   总被引:1,自引:0,他引:1  
  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