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   1289篇
  免费   47篇
  国内免费   81篇
耳鼻咽喉   1篇
儿科学   67篇
妇产科学   12篇
基础医学   135篇
口腔科学   23篇
临床医学   224篇
内科学   302篇
皮肤病学   33篇
神经病学   27篇
特种医学   302篇
外科学   100篇
综合类   26篇
预防医学   28篇
眼科学   6篇
药学   71篇
肿瘤学   60篇
  2022年   3篇
  2021年   8篇
  2019年   12篇
  2018年   7篇
  2017年   10篇
  2016年   10篇
  2015年   19篇
  2014年   11篇
  2013年   28篇
  2012年   12篇
  2011年   14篇
  2010年   49篇
  2009年   45篇
  2008年   21篇
  2007年   61篇
  2006年   20篇
  2005年   29篇
  2004年   12篇
  2003年   13篇
  2002年   19篇
  2001年   17篇
  2000年   23篇
  1999年   30篇
  1998年   94篇
  1997年   88篇
  1996年   110篇
  1995年   84篇
  1994年   87篇
  1993年   74篇
  1992年   23篇
  1991年   36篇
  1990年   30篇
  1989年   34篇
  1988年   38篇
  1987年   31篇
  1986年   35篇
  1985年   34篇
  1984年   13篇
  1983年   21篇
  1982年   20篇
  1981年   21篇
  1980年   17篇
  1979年   4篇
  1978年   9篇
  1977年   14篇
  1976年   13篇
  1975年   7篇
  1970年   1篇
  1969年   1篇
  1966年   1篇
排序方式: 共有1417条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
From 1978 to 1988, we performed 110 laparotomies for hepatic metastases. With 41 resections for colorectal metastases, the survival was 34% at 3 years. The operative mortality was 7%. With 25 resections for non colorectal liver metastases, the survival was 42% at 1 year, 12% at 3 years. The results, compared with those of literature justify, in the absence of any other potential curative treatment, to remove colorectal liver metastases. For metastases from other tumours, results of resection for endocrine tumours and few sarcomas invite us to an aggressive approach.  相似文献   
5.
Only palliative treatment may be contemplated when advanced oesophageal cancers present with dysphagia. Operability depends on respiratory, hepatic and nutritional status. Resectability may be assessed on the information provided by bronchoscopy, thoracic CT scan and surgical exploration. Advanced resectable oesophageal cancers require oesophagectomy without thoracotomy and radiotherapy. We performed 93 oesophagectomies in 106 advanced oesophageal cancers with a mortality rate of less than 2%. Non resectable advanced oesophageal cancers require bypass procedures. We performed 13 in the 106 cases. Inoperable advanced oesophageal cancers require radiotherapy in the absence of a fistula, laser therapy or an endoprosthesis for dysphagia.  相似文献   
6.
7.
8.
9.
BACKGROUND: Knowledge of the prevalence of peripheral arterial disease (PAD) in patients with chronic renal failure (CRF) is limited because of a lack of uniformity in disease definition and recognition. Furthermore, little is known of the prevalence of medial arterial calcification (MAC) in patients with CRF. Our goal is to study the prevalence of PAD and MAC defined by ankle brachial index (ABI) or toe brachial index (TBI) measurements in a Finnish population of patients with CRF consisting of predialysis and dialysis patients, as well as renal transplant recipients. METHODS: We examined 136 patients with CRF and 59 control subjects. Fifty-nine of the patients with CRF had moderate to severe predialysis CRF, 36 patients were on dialysis treatment, and 41 were renal transplant recipients. Mean age of patients was 51.9 +/- 11.5 years, and 39 patients (29%) had diabetes. ABI and TBI were measured by means of photoplethysmography. The definition of PAD required an ABI value of 0.90 or less, a TBI value of 0.60 or less, or a previous positive lower-extremity angiogram result. ABI values of 1.3 or greater or incompressible arteries at ankle level indicated MAC. The presence of claudication was determined by an interview. RESULTS: Prevalences of PAD on this study were 22.0% in patients with predialysis CRF, 30.6% in patients on dialysis treatment, 14.6% in renal transplant recipients, and 1.7% in the control group (P = 0.001). Prevalences of MAC were 23.7%, 41.7%, 23.1%, and 3.4% (P < 0.001), respectively. Only 9 patients had claudication, and 6 of those patients had PAD. CONCLUSION: Both asymptomatic PAD and MAC are common in patients with CRF. Therefore, we recommend the use of both ABI and TBI measurements in the evaluation of PAD in patients with CRF.  相似文献   
10.
We used arthrotomography to study the glenoid labrum in 114 patients. Sixty-nine of the patients had anatomic instability of the shoulder (including recurrent dislocation and subluxation of the shoulder), and 45 patients had functional instability of the shoulder (denoted by chronic pain, clicking of the joint, and the sensation that an unstable condition exists without the objective signs of it). Labral tears were revealed arthrotomographically in 86% of the patients with anatomic instability, while only 40% of the patients with functional instability had labral abnormalities, and these were primarily of minor severity. Fifty-six patients (44 of whom had anatomic instability; 12, functional instability) required surgery. The surgical findings were correlated with the arthrotomographic findings, and no false-positive results were revealed. However, arthrotomography demonstrated only part of the pathologic condition of two patients. These results confirm that there is a strong correlation between labral pathologic conditions and anatomic instability of the shoulder. Arthrotomographic studies have a great impact on the selection of therapy in cases of both anatomic and functional instability of the shoulder.  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