首页 | 官方网站   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   5107982篇
  免费   395640篇
  国内免费   16146篇
医药卫生   5519768篇
  2021年   57230篇
  2019年   59649篇
  2018年   77175篇
  2017年   58899篇
  2016年   65347篇
  2015年   77553篇
  2014年   111973篇
  2013年   178050篇
  2012年   147756篇
  2011年   156939篇
  2010年   133666篇
  2009年   132560篇
  2008年   141930篇
  2007年   152773篇
  2006年   159544篇
  2005年   153374篇
  2004年   153810篇
  2003年   143134篇
  2002年   131969篇
  2001年   209829篇
  2000年   206554篇
  1999年   184443篇
  1998年   77240篇
  1997年   71292篇
  1996年   69209篇
  1995年   64697篇
  1994年   58561篇
  1993年   54190篇
  1992年   134764篇
  1991年   129184篇
  1990年   124483篇
  1989年   121091篇
  1988年   111308篇
  1987年   108969篇
  1986年   102654篇
  1985年   99849篇
  1984年   80502篇
  1983年   70745篇
  1982年   52354篇
  1981年   48302篇
  1980年   45047篇
  1979年   69298篇
  1978年   53748篇
  1977年   47375篇
  1976年   43940篇
  1975年   44849篇
  1974年   50172篇
  1973年   48134篇
  1972年   45131篇
  1971年   41834篇
排序方式: 共有10000条查询结果,搜索用时 359 毫秒
991.
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   
992.
993.
994.

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   
995.
996.
997.
998.
999.
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   
1000.
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-23

京公网安备 11010802026262号