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   3017306篇
  免费   263136篇
  国内免费   13328篇
耳鼻咽喉   41412篇
儿科学   95459篇
妇产科学   76004篇
基础医学   495430篇
口腔科学   81206篇
临床医学   272115篇
内科学   520971篇
皮肤病学   85021篇
神经病学   258130篇
特种医学   118376篇
外国民族医学   100篇
外科学   473370篇
综合类   94071篇
现状与发展   23篇
一般理论   2113篇
预防医学   253582篇
眼科学   69292篇
药学   205529篇
  18篇
中国医学   9724篇
肿瘤学   141824篇
  2021年   54744篇
  2020年   34990篇
  2019年   57876篇
  2018年   70308篇
  2017年   53195篇
  2016年   58574篇
  2015年   73098篇
  2014年   107194篇
  2013年   172161篇
  2012年   80398篇
  2011年   78698篇
  2010年   113696篇
  2009年   118702篇
  2008年   65953篇
  2007年   67554篇
  2006年   78857篇
  2005年   74087篇
  2004年   76417篇
  2003年   67439篇
  2002年   57547篇
  2001年   85181篇
  2000年   77122篇
  1999年   80587篇
  1998年   63060篇
  1997年   61292篇
  1996年   59001篇
  1995年   54530篇
  1994年   48708篇
  1993年   45486篇
  1992年   54368篇
  1991年   52188篇
  1990年   49268篇
  1989年   49441篇
  1988年   45700篇
  1987年   44458篇
  1986年   42270篇
  1985年   42809篇
  1984年   41083篇
  1983年   38186篇
  1982年   38928篇
  1981年   36981篇
  1980年   34965篇
  1979年   32865篇
  1978年   30797篇
  1977年   28627篇
  1976年   26286篇
  1975年   24900篇
  1974年   24654篇
  1973年   23524篇
  1972年   22004篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
951.
Abstract

Objective

Two similarly designed studies compared user experiences with a second-generation extra-thin-wall, 5-bevel 32?G?×?4?mm pen needle (PN) with redesigned hub versus four thinner commercially available PNs.  相似文献   
952.
953.
954.

Introduction The focus in clinical pharmacy practice is and has for the last 30–35 years been on changing the role of pharmacy staff into service orientation and patient counselling. One way of doing this is by involving staff in change process and as a researcher to take part in the change process by establishing partnerships with staff. On the background of the authors’ widespread action research (AR)-based experiences, recommendations and comments for how to conduct an AR-study is described, and one of their AR-based studies illustrate the methodology and the research methods used. Methodology AR is defined as an approach to research which is based on a problem-solving relationship between researchers and clients, which aims at both solving a problem and at collaboratively generating new knowledge. Research questions relevant in AR-studies are: what was the working process in this change oriented study? What learning and/or changes took place? What challenges/pitfalls had to be overcome? What were the influence/consequences for the involved parts? When to use If you want to implement new services and want to involve staff and others in the process, an AR methodology is very suitable. The basic advantages of doing AR-based studies are grounded in their participatory and democratic basis and their starting point in problems experienced in practice. Limitations Some of the limitations in AR-studies are that neither of the participants in a project steering group are the only ones to decide. Furthermore, the collective process makes the decision-making procedures relatively complex.

  相似文献   
955.
956.
957.
958.
959.
We report a case of dichorionic, diamniotic twins who developed similar erythematous, annular, erosive plaques in the inguinal folds in the first few weeks of life that were refractory to topical antifungals and oral antibiotics. The twins were found to have high transaminase levels, antinuclear antibody positivity, and anti‐SSS/Ro) and anti‐SSB/La autoantibodies. The rash resolved without scarring by 7 months of age with the use of low‐potency topical corticosteroids. We suggest that physicians consider neonatal lupus erythematosus in neonates with atypical eruptions occurring in sun‐protected skin.  相似文献   
960.
Pediatric dermatology is one of the smallest subspecialties, and expanding the availability of care is of great interest. Teledermatology has been proposed as a way to expand access and improve care delivery, but no current assessment of pediatric teledermatology exists. The objective of the current study was to assess usage and perspectives on pediatric teledermatology. Surveys were distributed electronically to all 226 board‐certified U.S. pediatric dermatologists; 44% (100/226) responded. Nearly all respondents (89%) have experience with teledermatology. Formal teledermatology reimbursement success rates have increased to 35%. Respondents were positive about teledermatology's present and future prospects, and 41% want to use teledermatology more often, although they viewed teledermatology as somewhat inferior to in‐person care regarding accuracy of diagnosis and appropriation of management plans. Significant differences were found between formal teledermatology users and nonusers in salary structure, practice environment, sex, and region. Substantial increases in pediatric teledermatology have occurred in the last 5 to 10 years, and there remains cause for optimism for teledermatology's future. Concerns about diagnostic confidence and care quality indicate that teledermatology may be best for care of patients with characteristic clinical presentations or management of patients with established diagnoses.  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