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   6817篇
  免费   420篇
  国内免费   11篇
耳鼻咽喉   45篇
儿科学   264篇
妇产科学   136篇
基础医学   739篇
口腔科学   106篇
临床医学   1477篇
内科学   1142篇
皮肤病学   61篇
神经病学   515篇
特种医学   124篇
外科学   595篇
综合类   77篇
一般理论   9篇
预防医学   876篇
眼科学   85篇
药学   355篇
中国医学   1篇
肿瘤学   641篇
  2024年   3篇
  2023年   38篇
  2022年   53篇
  2021年   124篇
  2020年   76篇
  2019年   93篇
  2018年   144篇
  2017年   106篇
  2016年   120篇
  2015年   132篇
  2014年   226篇
  2013年   327篇
  2012年   492篇
  2011年   577篇
  2010年   301篇
  2009年   266篇
  2008年   491篇
  2007年   567篇
  2006年   520篇
  2005年   535篇
  2004年   496篇
  2003年   455篇
  2002年   462篇
  2001年   43篇
  2000年   25篇
  1999年   64篇
  1998年   57篇
  1997年   55篇
  1996年   49篇
  1995年   41篇
  1994年   44篇
  1993年   29篇
  1992年   28篇
  1991年   24篇
  1990年   15篇
  1989年   11篇
  1988年   9篇
  1987年   11篇
  1986年   8篇
  1985年   11篇
  1984年   21篇
  1983年   14篇
  1982年   18篇
  1981年   11篇
  1980年   19篇
  1978年   3篇
  1975年   4篇
  1973年   2篇
  1971年   2篇
  1927年   2篇
排序方式: 共有7248条查询结果,搜索用时 31 毫秒
1.
2.
3.
We report a case of successful transvenous, catheter-based, cavotricuspid isthmus ablation for treatment of atrial flutter using microwave energy. Microwave energy was delivered at 900–930 MHz using 21 W of power. Bidirectional cavotricuspid isthmus conduction block was achieved by microwave ablation without any patient discomfort or complication during the procedure. Our initial experience suggests that transcatheter microwave ablation is feasible for the cure of typical atrial flutter.  相似文献   
4.
BACKGROUND: Despite increasing numbers of morbidly obese patients admitted to acute care facilities for surgery or treatment of nonsurgical conditions, there is little evidence of the problems nurses face in providing care to these patients. Anecdotal evidence suggests that the care of these patients is more demanding than the care of nonobese patients. The objective of this study was to describe nurses' perceptions of the challenges that they face when caring for morbidly obese patients. METHODS: Focus groups of nurses from a tertiary care facility were convened. A trained facilitator posed questions to the group concerning various aspects of care for morbidly obese patients. Comments of respondents were categorized using NVIVO software. RESULTS: Nurses reported concerns about the increased staffing needs required for care of these patients and the particular challenges of the physical care. Concerns also included the availability, placement, and use of specialized equipment. Room size and the absence of some equipment were also problematic. Finally, nurses perceived safety issues, both for themselves and their patients. CONCLUSIONS: Morbidly obese patients in the acute care setting require specialized nursing care in terms of techniques, levels of staffing required, and the use of specialized equipment.  相似文献   
5.
CATARACT IN DYSTROPHIA MYOTONICA (MYOTONIA ATROPHICA)   总被引:1,自引:1,他引:0  
  相似文献   
6.
BACKGROUND: The impact of infection with Burkholderia gladioli in cystic fibrosis, other chronic airway diseases and immunosuppressed patients is unknown. METHODS: A six-year retrospective review of all patients with B. gladioli infection was performed in a tertiary referral center with cystic fibrosis and lung transplantation programs. In addition, a targeted survey of all 251 lung transplant recipients was performed. Available B. gladioli isolates were analyzed via pulsed field gel electrophoresis. RESULTS: Thirty-five patients were culture positive for B. gladioli, including 33 CF patients. No bacteremia was identified. Isolates were available in 18 patients and all were genetically distinct. Two-thirds of these isolates were susceptible to usual anti-pseudomonal antibiotics. After acquisition, only 40% of CF patients were chronically infected (> or =2 positive cultures separated by at least 6 months). Chronic infection was associated with resistance to > or =2 antibiotic groups on initial culture and failure of eradication after antibiotic therapy. The impact of acquisition of B. gladioli infection in chronic infection was variable. Three CF patients with chronic infection underwent lung transplantation. One post-transplant patient developed a B. gladioli mediastinal abscess, which was treated successfully. CONCLUSIONS: The majority of patients' culture positive for B. gladioli at our center have CF. B. gladioli infection is often transient and is compatible with satisfactory post-lung transplantation outcomes.  相似文献   
7.
8.
9.
10.
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