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   4652篇
  免费   527篇
  国内免费   22篇
医药卫生   5201篇
  2021年   82篇
  2020年   52篇
  2019年   84篇
  2018年   63篇
  2017年   81篇
  2016年   98篇
  2015年   94篇
  2014年   127篇
  2013年   151篇
  2012年   204篇
  2011年   200篇
  2010年   155篇
  2009年   147篇
  2008年   167篇
  2007年   182篇
  2006年   182篇
  2005年   186篇
  2004年   156篇
  2003年   136篇
  2002年   128篇
  2001年   126篇
  2000年   142篇
  1999年   121篇
  1998年   95篇
  1997年   71篇
  1996年   73篇
  1995年   67篇
  1994年   68篇
  1993年   48篇
  1992年   106篇
  1991年   83篇
  1990年   95篇
  1989年   107篇
  1988年   85篇
  1987年   81篇
  1986年   81篇
  1985年   95篇
  1984年   70篇
  1983年   50篇
  1982年   53篇
  1980年   46篇
  1978年   39篇
  1977年   63篇
  1976年   41篇
  1973年   43篇
  1972年   45篇
  1971年   47篇
  1970年   57篇
  1969年   39篇
  1968年   43篇
排序方式: 共有5201条查询结果,搜索用时 0 毫秒
1.
2.
3.
4.
5.
6.
Pancreatogastrostomy: a safe drainage procedure after pancreatoduodenectomy   总被引:8,自引:0,他引:8  
R Delcore  J H Thomas  G E Pierce  A S Hermreck 《Surgery》1990,108(4):641-5; discussion 645-7
The purpose of this study was to evaluate the role of pancreaticogastrostomy as an alternative method of restoring pancreaticointestinal continuity after pancreaticoduodenectomy. Since 1975, 45 patients have undergone pancreaticogastrostomy after pancreaticoduodenectomy at our institution. Pancreaticoduodenectomy was performed for pancreatic carcinoma (24 patients), ampullary carcinoma (8 patients), duodenal carcinoma (4 patients), common bile duct carcinoma (4 patients), pancreatic islet cell carcinoma (1 patient), trauma (1 patient), extensive colon carcinoma (1 patient), chronic pancreatitis (1 patient), and gastroduodenal artery aneurysm (1 patient). There was one operative death, for an overall operative mortality rate of 2%, and seven patients had major postoperative complications, for an overall morbidity rate of 15%. No pancreatic anastomotic leaks or other complications related to the pancreaticogastrostomy occurred. Twenty-four patients have died of recurrent carcinoma, with a mean survival of 25 months (range, 5 to 66 months), and 20 patients are alive and well, with a mean follow-up of 27 months (range, 2 to 106 months). Eight of these patients are alive 2 or more years after operation and four do not have exocrine pancreatic insufficiency. This experience confirms that pancreaticogastrostomy is a safe method of pancreatic drainage after pancreaticoduodenectomy and suggests that it may have technical advantages and therefore merits more widespread application.  相似文献   
7.
Advances in science have increased the knowledge of how cells die in the body (apoptosis). A basic understanding of this process can improve nurses' ability to review new scientific literature and enable them to provide safer bedside care.  相似文献   
8.
Between 1977 and 1986, 75 black and 615 white women with American Joint Committee (AJC) Stages I and II breast cancer were treated with excisional biopsy, axillary dissection, and radiation therapy for breast conservation. Cyclophosphamide, methotrexate, and 5-fluorouracil, with and without prednisone and tamoxifen, was given to 92% of premenopausal, 83% of perimenopausal, and 63% of postmenopausal node-positive women; 20 of 106 (19%) postmenopausal node-positive women received tamoxifen only. The clinical characteristics of the similarly treated patients were compared. The 5-year actuarial local only first failure rate was 5% for black women and 6% for white women (P = 0.53). Regional only failure as the first site of failure was 9% for blacks versus 1% for whites (P = 0.002), with regional recurrence as any component of first failure being 16% for blacks and 4% for whites (P = 0.001). The supraclavicular fossa was identified as the primary site of regional recurrence in black patients with either pathologically positive or negative axillae. Distant metastases as the only site of first failure were significantly greater in the black population with a 20% 5-year actuarial failure rate versus 11% in white patients (P = 0.01). The 5-year actuarial overall survival for the black patients was 82% versus 91% for the white patients (P = 0.01), with no-evidence-of-disease (NED) survival being 64% and 83% (P = 0.0002) and relapse-free survival (RFS) being 61% and 77% (P = 0.01), respectively. Black patients younger than 40 years of age or with pathologically positive axillary nodes had significantly worse NED, RFS, and overall survival compared with similarly staged white patients. Cosmetic results were analyzed at 3 and 5 years after completion of therapy. Although significantly fewer black patients had an excellent-to-good cosmetic result at 3 years compared with white patients, the results were not significantly different at 5 years. These results show that appropriately selected black patients with early stage breast cancer have excellent local control after conservative surgery and radiation therapy and should continue to be offered breast preservation as an alternative to mastectomy. Patterns of failure, however, demonstrated higher regional and distant recurrence rates and lower NED, RFS, and overall survival rates in most subsets of black patients reviewed.  相似文献   
9.
This article describes a specialized rehabilitation education program, based on adult learning theory, that was developed to promote retention of rehabilitation nurses at MetroHealth Center for Rehabilitation in Cleveland. The curriculum encompasses the skills required to care for rehabilitation patients needing both advanced rehabilitation nursing and critical care nursing. Critical care and rehabilitation nurses collaborated in the presentation of topics and were guided by the course coordinators. Learners were chosen based on experience in rehabilitation, with priority given to those certified in rehabilitation nursing. A variety of evaluation methods elicited positive responses. A 6-month postcourse survey also was completed to assess the long-term effects of the course.  相似文献   
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-23

京公网安备 11010802026262号