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   1824篇
  免费   223篇
  国内免费   19篇
耳鼻咽喉   21篇
儿科学   63篇
妇产科学   43篇
基础医学   136篇
口腔科学   52篇
临床医学   237篇
内科学   345篇
皮肤病学   152篇
神经病学   290篇
特种医学   136篇
外科学   206篇
综合类   100篇
现状与发展   30篇
预防医学   83篇
眼科学   31篇
药学   59篇
中国医学   3篇
肿瘤学   79篇
  2024年   18篇
  2023年   179篇
  2022年   17篇
  2021年   20篇
  2020年   63篇
  2019年   30篇
  2018年   69篇
  2017年   59篇
  2016年   55篇
  2015年   66篇
  2014年   95篇
  2013年   97篇
  2012年   66篇
  2011年   89篇
  2010年   102篇
  2009年   112篇
  2008年   50篇
  2007年   85篇
  2006年   41篇
  2005年   36篇
  2004年   44篇
  2003年   25篇
  2002年   34篇
  2001年   24篇
  2000年   21篇
  1999年   30篇
  1998年   40篇
  1997年   49篇
  1996年   40篇
  1995年   36篇
  1994年   31篇
  1993年   34篇
  1992年   14篇
  1991年   10篇
  1990年   11篇
  1989年   24篇
  1988年   22篇
  1987年   22篇
  1986年   11篇
  1985年   14篇
  1984年   16篇
  1982年   9篇
  1981年   11篇
  1980年   15篇
  1979年   9篇
  1978年   13篇
  1976年   19篇
  1975年   14篇
  1972年   11篇
  1971年   10篇
排序方式: 共有2066条查询结果,搜索用时 15 毫秒
1.
2.
Hysterosalpingography was performed in 31 patients by means of a low-dose scanning-beam digital radiographic system. The technique permits adequate evaluation of gynecologic abnormalities while allowing significant reduction in radiation: 2.4-mR (6.1 X 10(-7) C/kg) exposure to the skin and 0.7-mrad (7 X 10(-6) Gy) mean dose to the ovaries per image obtained. Sixteen patients demonstrated readily recognizable and documented abnormalities, corroborated by laparoscopy, laparotomy, or other supportive evidence.  相似文献   
3.
4.
Defecography in multiple sclerosis patients with severe constipation   总被引:3,自引:0,他引:3  
Gill  KP; Chia  YW; Henry  MM; Shorvon  PJ 《Radiology》1994,191(2):553
  相似文献   
5.
6.
Depression is common in Parkinson's disease (PD) and affects 30 to 50% of all patients. In contrast to the wealth of research on depression in PD, little is known about the occurrence of depression in other movement disorders. The primary objective of the current study was to determine whether the high prevalence of depression symptoms seen in PD is also found in other movement disorders, by directly comparing rates of specific depression symptoms and depression severity across PD, dystonia, and essential tremor (ET). Three hundred and fifty-four patients with PD, 83 patients with dystonia, and 53 patients with ET completed the Beck Depression Inventory (BDI). We found no significant between-groups differences for depression severity, frequency, or endorsement of specific depression symptoms. Forty-eight percent of PD patients, 37.3% of dystonia patients, and 34% of ET patients were found to be at least mildly depressed (BDI score of 10 or higher). The most commonly endorsed symptoms were fatigability, difficulty with work, anhedonia, and sleep disturbance. Clinicians should be aware that depression is a frequent problem in dystonia and ET, in addition to PD, and inquire about depression symptoms in these patients so that they can be appropriately treated.  相似文献   
7.
8.
Solitary bronchioloalveolar carcinoma: CT criteria   总被引:14,自引:0,他引:14  
The computed tomographic (CT) scans of 30 patients with solitary bronchioloalveolar carcinoma were reviewed. Common features at CT included the peripheral or subpleural location of a pulmonary mass (25 cases), pseudocavitation (18 cases), heterogeneous attenuation (17 cases), irregular margins forming a star pattern (22 cases), and pleural tags (21 cases). Using these CT criteria, four independent observers attempted to identify cases of bronchioloalveolar carcinoma from a larger sample of lung cancers and benign lesions by categorizing a series of test cases into four probability categories. Although the bronchioloalveolar carcinomas were correctly ranked in the two highest probability categories 75% of the time (in 45 of 60 cases), there was considerable overlap with other lung lesions, particularly with adenocarcinoma and large cell undifferentiated carcinoma. However, even though the typical features of bronchioloalveolar carcinoma are not invariable or highly specific, they are characteristic enough to suggest the diagnosis.  相似文献   
9.
10.

Background  

We present the design of an open randomized multi-centre study on surgical versus conservative treatment of acute Achilles tendon ruptures. The study is designed to evaluate the effectiveness of conservative treatment in reducing complications when treating acute Achilles tendon rupture.  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