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   2776篇
  免费   155篇
  国内免费   164篇
耳鼻咽喉   24篇
儿科学   77篇
妇产科学   46篇
基础医学   349篇
口腔科学   36篇
临床医学   281篇
内科学   661篇
皮肤病学   58篇
神经病学   124篇
特种医学   390篇
外科学   333篇
综合类   48篇
现状与发展   1篇
预防医学   111篇
眼科学   53篇
药学   288篇
  1篇
中国医学   18篇
肿瘤学   196篇
  2023年   13篇
  2022年   23篇
  2021年   55篇
  2020年   24篇
  2019年   39篇
  2018年   53篇
  2017年   50篇
  2016年   56篇
  2015年   75篇
  2014年   94篇
  2013年   122篇
  2012年   152篇
  2011年   194篇
  2010年   115篇
  2009年   97篇
  2008年   112篇
  2007年   222篇
  2006年   121篇
  2005年   115篇
  2004年   84篇
  2003年   53篇
  2002年   91篇
  2001年   77篇
  2000年   54篇
  1999年   56篇
  1998年   98篇
  1997年   86篇
  1996年   89篇
  1995年   81篇
  1994年   52篇
  1993年   53篇
  1992年   14篇
  1991年   28篇
  1990年   22篇
  1989年   55篇
  1988年   43篇
  1987年   35篇
  1986年   37篇
  1985年   43篇
  1984年   27篇
  1983年   18篇
  1982年   29篇
  1981年   22篇
  1980年   18篇
  1979年   10篇
  1978年   7篇
  1977年   19篇
  1976年   28篇
  1975年   16篇
  1970年   4篇
排序方式: 共有3095条查询结果,搜索用时 15 毫秒
1.
Although surgical lung resection could improve prognosis in some patients with multidrug-resistant tuberculosis (MDR-TB), there are no reports on the optimal candidates for this surgery. The aim of the present study was to elucidate the prognostic factors for surgery in patients with MDR-TB. Patients who underwent lung resection for the treatment of MDR-TB between March 1993 and December 2004 were included in the present study. Treatment failure was defined as greater than or equal to two of the five cultures recorded in the final 12 months of treatment being positive, any one of the final three cultures being positive, or the patient having died during treatment. The variables that affected treatment outcomes were identified through univariate and multivariate logistic regression analysis. In total, 79 patients with MDR-TB were included in the present study. The treatment outcomes of 22 (27.8%) patients were classified as failure. A body mass index <18.5 kg x m(-2), primary resistance, resistance to ofloxacin and the presence of a cavitary lesion beyond the range of the surgical resection were associated with treatment failure. Low body mass index, primary resistance, resistance to ofloxacin and cavitary lesions beyond the range of resection are possible poor prognostic factors for surgical lung resection in multidrug-resistant tuberculosis patients.  相似文献   
2.
高效液相色谱法测定人血浆中阿莫西林浓度及药代动力学   总被引:6,自引:0,他引:6  
谭力  周继红  罗楠  袁倚盛 《药学学报》1997,32(7):558-560
高效液相色谱法测定人血浆中阿莫西林浓度及药代动力学谭力周继红罗楠袁倚盛(南京军区南京总医院中心仪器分析科,南京210001)阿莫西林(amoxicilin)为β内酰胺类抗生素,其抗菌谱广,口服受食物影响小,对大多数病人耐受性良好,因而在临床上得以广泛...  相似文献   
3.
4.
The author reports his personal experience on the management of anterior mediastinal masses using video-assisted thoracoscopic surgery (VATS) at a single institution. From August 1993 to March 1995, 24 patients (14 males and 10 females ranging in age from 9 to 76 years old) with anterior mediastinal masses were diagnosed or treated by VATS. This consisted of 11 biopsies and 13 resections (11 thymectomies and 2 thymic cystectomies). Seven biopsies were performed for primary histological diagnosis (four non-Hodgkin's lymphoma, two metastatic carcinoma, one yolk sac tumor) and four biopsies were performed to detect residual tumors following chemotherapy. Complete thymectomy was accomplished in all 11 cases by examination of the thymic bed and resected specimen. We have reserved this approach for resection of benign masses only. Adequate biopsy for histological diagnosis was obtained in all 11 cases to guide further management. There was no surgical mortality or intraoperative complications. The median postoperative hospital stay for the entire group was 3 days. We conclude that VATS for resection or biopsy of an anterior mediastinal mass is technically feasible and provides an alternative to the conventional approaches in selected patients.  相似文献   
5.
Abstract Background: Within a short period of time, video assisted thoracoscopic surgery (VATS) has revolutionised the practice of thoracic surgery. Most of the existing literature, however, is concentrated on the technical aspects.
Aims: We examined the impact of VATS on our practice and its implications.
Methods: We reviewed our thoracic case load two years before and two years after the introduction of VATS in our hospital.
Results: We have witnessed a rapid and progressive increase in our thoracic case load since the introduction of VATS. With increased experience, proportionally more cases were performed using VATS compared to conventional surgical access. The increased case load covered a wide range of thoracic diseases with the majority for spontaneous pneumothorax and pleural diseases.
Conclusion: The higher case load is due to increased referrals which at least partly reflect earlier acceptance by both the patients and their physicians for surgical intervention. The changing indications for surgery and the high cost associated with VATS, however, could place extra demand on the healthcare, especially for some countries in Asia. Cost containment is therefore a high priority here. More research is greatly needed in this area.  相似文献   
6.
7.
Adverse reaction to intravenous gadoteridol   总被引:1,自引:0,他引:1  
  相似文献   
8.
9.
10.
The fibula free flap has become an established flap for mandible reconstruction when vascularized bone is desirable. Recreating mandibular contour, providing soft tissue coverage, and restoring masticatory function are equally important in mandible reconstruction, and these can be provided by the fibula osteoseptocutaneous flap. This article is a summary of the anatomy, indications, and operative technique of the fibula osteoseptocutaneous flap accumulated from 49 consecutive mandible reconstructions. © 1994 Wiley-Liss, Inc.  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