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   3210篇
  免费   168篇
  国内免费   55篇
耳鼻咽喉   43篇
儿科学   130篇
妇产科学   34篇
基础医学   370篇
口腔科学   70篇
临床医学   317篇
内科学   616篇
皮肤病学   62篇
神经病学   185篇
特种医学   103篇
外科学   764篇
综合类   60篇
一般理论   4篇
预防医学   127篇
眼科学   136篇
药学   168篇
中国医学   13篇
肿瘤学   231篇
  2023年   36篇
  2022年   77篇
  2021年   135篇
  2020年   60篇
  2019年   115篇
  2018年   116篇
  2017年   91篇
  2016年   90篇
  2015年   91篇
  2014年   145篇
  2013年   141篇
  2012年   251篇
  2011年   243篇
  2010年   140篇
  2009年   116篇
  2008年   184篇
  2007年   195篇
  2006年   190篇
  2005年   181篇
  2004年   184篇
  2003年   119篇
  2002年   102篇
  2001年   41篇
  2000年   45篇
  1999年   33篇
  1998年   15篇
  1997年   16篇
  1996年   18篇
  1995年   18篇
  1994年   15篇
  1993年   11篇
  1992年   14篇
  1991年   12篇
  1990年   13篇
  1989年   7篇
  1988年   12篇
  1987年   9篇
  1986年   13篇
  1985年   8篇
  1984年   9篇
  1983年   9篇
  1980年   8篇
  1979年   18篇
  1978年   7篇
  1977年   7篇
  1976年   6篇
  1974年   15篇
  1973年   6篇
  1972年   7篇
  1970年   9篇
排序方式: 共有3433条查询结果,搜索用时 0 毫秒
1.
The association between asbestos exposure, mainly in occupational settings, and malignant mesothelioma has been well established; this has prompted several countries to establish mesothelioma epidemiologic surveillance programs often at the request of national agencies. This review compares currently existing mesothelioma registries worldwide to develop a concept model for a US real-time case capture mesothelioma registry. Five countries were identified with a mesothelioma specific registry, including Italy, France, UK, Australia, and South Korea. All, except the UK, used interviews to collect exposure data. Linkage with the national death index was available or was in future plans for all registries. The registries have limited information on treatment, quality of life, and other patient-centered outcomes such as symptoms and pain management. To thoroughly collect exposure data, “real-time” enrollment is preferable; to maximize the capture of mesothelioma cases, optimal coverage, and a simplified consent process are needed.  相似文献   
2.
3.
4.
Perianal mucinous adenocarcinoma is a rare tumour which may be associated with long‐standing chronic perianal sepsis. Early diagnosis is challenging and is based on a high index of clinical suspicion and specific histological features. Definitive treatment is surgical, in the form of an abdomino‐perineal resection. We hereby describe a case of a perianal mucinous adenocarcinoma arising from long‐standing recurrent perianal fistula and complement this with a brief review of the literature pertaining in particular to the management of this condition.  相似文献   
5.
We compared three maintenance immunosuppressive regimens in a rapid discontinuation of prednisone protocol. From March 1, 2001, through December 31, 2003, 239 first and second kidney transplant recipients (166 LD; 73 DD) were randomized. All recipients were treated with Thymoglobulin; all received steroids intraoperatively and for 5 days postoperatively. Randomization was to cyclosporine-mycophenolate mofetil (n = 85); high-level tacrolimus (TAC) (8-12 ng/mL)-low-level sirolimus (SRL) (3-7 ng/mL) (n = 72); or low-level TAC (3-7 ng/mL)-high-level SRL (8-12 ng/mL) (n = 82). We found no difference at 24 months between groups in patient, graft, death-censored graft, or acute rejection-free graft survival, or in kidney function. Wound complications were more common in SRL-treated recipients (p = 0.02); we found no other differences between groups in complication rates. Our data suggest that excellent patient and graft survival and low rejection rates can be obtained using a variety of maintenance protocols without prednisone.  相似文献   
6.
7.
8.
9.
Classical and anaplastic seminoma: difference in survival   总被引:1,自引:0,他引:1  
Bobba  VS; Mittal  BB; Hoover  SV; Kepka  A 《Radiology》1988,167(3):849-852
Classical and anaplastic seminoma are traditionally treated with radiation therapy and are said to have the same prognosis. A retrospective study was undertaken of 90 seminoma patients treated with radiation therapy between 1961 and 1985. The classical group consisted of 71 patients of whom 50 had stage I and 21 had stage II disease. The anaplastic group consisted of 19 patients of whom ten had stage I and nine had stage II disease. The median follow-up time was 64 months for the entire group. The 10-year relapse-free survival rate for the classical group was 94% and for the anaplastic group was 70% (P less than .05). For patients with classical stage I disease, the relapse-free actuarial survival rate was 98%; for patients with anaplastic stage I disease, it was 64% (P less than .02). For the classical stage II disease group, the relapse-free actuarial survival rate was 84% and for the anaplastic stage II disease group, 75% (P less than .70). Four patients in the classical group (6%) had relapses; of these, one patient had local recurrence of tumor, and three had distant metastases. In the anaplastic group, four patients (21%) had relapses; two patients had local recurrence of tumor, and two had distant metastases. Therefore the data suggest a difference in survival and relapse rates between classical and anaplastic seminoma.  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