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   25437篇
  免费   2211篇
  国内免费   85篇
耳鼻咽喉   381篇
儿科学   675篇
妇产科学   503篇
基础医学   3474篇
口腔科学   566篇
临床医学   2544篇
内科学   6099篇
皮肤病学   306篇
神经病学   2434篇
特种医学   753篇
外科学   4160篇
综合类   328篇
一般理论   18篇
预防医学   1893篇
眼科学   640篇
药学   1332篇
中国医学   40篇
肿瘤学   1587篇
  2023年   272篇
  2022年   510篇
  2021年   1096篇
  2020年   556篇
  2019年   848篇
  2018年   1000篇
  2017年   656篇
  2016年   645篇
  2015年   814篇
  2014年   1023篇
  2013年   1236篇
  2012年   1829篇
  2011年   1839篇
  2010年   994篇
  2009年   834篇
  2008年   1465篇
  2007年   1409篇
  2006年   1367篇
  2005年   1305篇
  2004年   1189篇
  2003年   1024篇
  2002年   1012篇
  2001年   191篇
  2000年   167篇
  1999年   196篇
  1998年   193篇
  1997年   173篇
  1996年   142篇
  1995年   132篇
  1994年   123篇
  1993年   123篇
  1992年   129篇
  1991年   119篇
  1990年   126篇
  1989年   102篇
  1988年   126篇
  1987年   133篇
  1986年   88篇
  1985年   122篇
  1984年   119篇
  1983年   114篇
  1982年   143篇
  1981年   133篇
  1980年   166篇
  1979年   88篇
  1978年   98篇
  1977年   88篇
  1976年   98篇
  1974年   83篇
  1973年   74篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
Reports of accessory soleus muscle are rare, perhaps as a result of it often remaining unrecognized. It presents as a swelling behind the ankle and may be mistaken for a tumour or inflammatory lesion, as occurred in the first of a series of three cases. The other two were incidental findings, one in a 30 year old man with an open tibial fracture and the other in a 9 month old child with a club foot. Patients present with either pain or a diagnostic problem. When large, it may make wearing of footwear difficult. Computerized tomography with electromyography enables confirmation of the diagnosis. Pain is relieved by epimysiotomy and when encountered incidentally during surgery, incision of the epimysium is all that is needed. Excision of the muscle may be considered only if wearing of footwear is difficult. The significance of its presence in a case of club foot is unknown. Disinsertion of its insertion was all that was required to obtain surgical correction of the deformity in the present case. Awareness of the condition will prevent unnecessary surgery in asymptomatic cases.  相似文献   
82.
Cleaning a firearm can be a hazardous task even when the gun is not loaded. This is the first reported case of hand injury from the barrel bore cleaning brush. Early surgical exploration and washout of the wound is required as it often heavily contaminated with rust and grime. The cleaning agents used are also highly corrosive to tissue.  相似文献   
83.
84.
Weight loss after gastric bypass procedures has been well studied, but the long-term metabolic sequelae are not known. Data on bone mineral density (BMD), calcium, parathyroid hormone, and vitamin D were collected preoperatively and at yearly intervals after gastric bypass procedures. A total of 230 patients underwent preoperative BMD scans. Fifteen patients were osteopenic preoperatively, and three patients subsequently developed osteopenia postoperatively within the first year. No patient had or developed osteoporosis. At 1 year, total forearm BMD decreased by 0.55% (n = 91; P = .03) and radius BMD had increased overall by 1.85% (n = 23; P = .008); both total hip and lumbar spine BMD decreased by 9.27% (n = 22; P < .001) and 4.53% (n = 31; P < .001), respectively. By the second postoperative year, BMD in the total forearm had decreased an additional 3.62% (n = 14; P<.001), whereas radius BMD remained unchanged. Although total hip and lumbar spine BMD significantly decreased at 1 year, by year 2 both total hip and lumbar spine BMD only slightly decreased and were not significantly different from before the operation. Serum calcium decreased from 9.8 mg/dL to 9.2 during the first year (not significant [NS]) and then to 8.8 (NS) by the second year. Parathyroid hormone increased from 59.7 pg/mL (nl 10-65 pg/mL) preoperatively to 63.1 during year 1 (NS) and continued to increase to 64.7 by year 2 (NS). No difference was noted among levels of 25-hydroxy vitamin D preoperatively (25.2 ng/mL; nl 10-65 ng/mL), at 1 year (34.4), and at 2 years (35.4). Our data indicate that bone loss is highest in the first year after gastric bypass with stabilization, and that, in some cases, there is an increase in bone density after the first year. Presented at the Forty-Sixth Annual Meeting of The Society for Surgery of the Alimentary Tract, Chicago, Illinois, May 14–18, 2005 (oral presentation).  相似文献   
85.
86.
87.
88.
89.
90.
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