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   894564篇
  免费   73917篇
  国内免费   1871篇
耳鼻咽喉   12998篇
儿科学   25685篇
妇产科学   25975篇
基础医学   128793篇
口腔科学   26093篇
临床医学   79364篇
内科学   170440篇
皮肤病学   17499篇
神经病学   73021篇
特种医学   36526篇
外国民族医学   174篇
外科学   140324篇
综合类   25239篇
现状与发展   2篇
一般理论   304篇
预防医学   70769篇
眼科学   21325篇
药学   67014篇
中国医学   1653篇
肿瘤学   47154篇
  2018年   7924篇
  2015年   8274篇
  2014年   11868篇
  2013年   17942篇
  2012年   24302篇
  2011年   25417篇
  2010年   14809篇
  2009年   13948篇
  2008年   24015篇
  2007年   26125篇
  2006年   26044篇
  2005年   25569篇
  2004年   25150篇
  2003年   24181篇
  2002年   23268篇
  2001年   36993篇
  2000年   37613篇
  1999年   31900篇
  1998年   9650篇
  1997年   8915篇
  1996年   8803篇
  1995年   8278篇
  1994年   8029篇
  1992年   27334篇
  1991年   26716篇
  1990年   26240篇
  1989年   25251篇
  1988年   23794篇
  1987年   23384篇
  1986年   22235篇
  1985年   21615篇
  1984年   16826篇
  1983年   14333篇
  1982年   9080篇
  1981年   8426篇
  1980年   7897篇
  1979年   17087篇
  1978年   12377篇
  1977年   10389篇
  1976年   9540篇
  1975年   10351篇
  1974年   12850篇
  1973年   12342篇
  1972年   11743篇
  1971年   10883篇
  1970年   10398篇
  1969年   10083篇
  1968年   9035篇
  1967年   8359篇
  1966年   7757篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.

Introduction

The nature of community pharmacy is changing, shifting from the preparation and distribution of medicines to the provision of cognitive pharmaceutical services (CPS); however, often the provision of traditional services leaves little time for innovative services. This study investigated the time community pharmacists spend on the tasks and activities of daily practice and to what extent they are able to implement CPS-related services in daily practice.

Methods

Self-reporting work sampling was used to register the activities of community pharmacists. A smartphone application, designed specifically for this purpose, alerted participants to register their current activity five times per working day for 6 weeks. Participants also completed an online survey about baseline characteristics.

Results

Ninety-one Dutch community pharmacists provided work-sampling data (7848 registered activities). Overall, 51.5% of their time was spent on professional activities, 35.4% on semi-professional activities, and 13.1% on non-professional activities. The proportion of time devoted to CPS decreased during the workweek, whereas the time spent on traditional task increased.

Discussion and conclusion

This study shows it is feasible to collect work-sampling data using smartphone technology. Community pharmacists spent almost half of their time on semi-professional and non-professional activities, activities that could be delegated to other staff members. In practice, the transition to CPS is hampered by competing traditional tasks, which prevents community pharmacists from profiling themselves as pharmaceutical experts in daily practice.  相似文献   
93.
94.
95.
Tauchunfälle     
Notfall + Rettungsmedizin - Tauchunfälle sind vergleichsweise selten und stellen (Erst‑)Helfer vor besondere Herausforderungen. Sie müssen schnell und kompetent behandelt werden, da...  相似文献   
96.
97.
98.
99.
100.
BACKGROUND: Physical activity is a healthful behavior that has promise for combating feelings of low energy and fatigue. Despite evidence suggesting that fatigue is a prodromal symptom of major cardiac events, improvements in feelings of energy and fatigue have largely been ignored by reviewers of cardiac rehabilitation literature who have focused on anxiety, depression and general measures of quality of life. DESIGN: A meta-analytical review. METHODS AND RESULTS: Computer databases were searched from January 1945 to May 2005 to identify relevant literature. A total of 36 studies consisting of 4765 subjects were included. Cardiac rehabilitation exercise programs were consistently associated with increases in energy and decreases in fatigue. The magnitude of the effect was moderately large (mean delta 0.51; 95% confidence interval 0.42-0.61) but was heterogeneous and modified by features of the research design. Comparison of effect sizes in cardiac rehabilitation studies concurrently measuring energy/fatigue, anxiety and depression suggest that exercise-based cardiac rehabilitation programs have larger effects on feelings of energy and fatigue compared with anxiety and depression. CONCLUSION: This review quantifies the potential benefit of cardiac rehabilitation exercise programs on feelings of energy and fatigue, and suggests that cardiac rehabilitation researchers and practitioners may benefit from examining, and perhaps even focusing on, feelings of energy and fatigue as an important outcome variable. A greater understanding of the effect of cardiac rehabilitation exercise programs on feelings of energy and fatigue will be reached when more true experiments are conducted thereby avoiding the primary limitation of the literature reviewed; that is, the frequent use of non-experimental research designs.  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