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   2830篇
  免费   255篇
  国内免费   21篇
耳鼻咽喉   22篇
儿科学   102篇
妇产科学   65篇
基础医学   224篇
口腔科学   57篇
临床医学   346篇
内科学   695篇
皮肤病学   132篇
神经病学   194篇
特种医学   191篇
外科学   355篇
综合类   98篇
现状与发展   30篇
一般理论   1篇
预防医学   121篇
眼科学   22篇
药学   252篇
中国医学   6篇
肿瘤学   193篇
  2024年   15篇
  2023年   186篇
  2022年   33篇
  2021年   44篇
  2020年   68篇
  2019年   40篇
  2018年   80篇
  2017年   71篇
  2016年   59篇
  2015年   92篇
  2014年   127篇
  2013年   122篇
  2012年   106篇
  2011年   130篇
  2010年   113篇
  2009年   121篇
  2008年   100篇
  2007年   122篇
  2006年   92篇
  2005年   85篇
  2004年   71篇
  2003年   82篇
  2002年   64篇
  2001年   63篇
  2000年   77篇
  1999年   86篇
  1998年   47篇
  1997年   67篇
  1996年   49篇
  1995年   48篇
  1994年   35篇
  1993年   47篇
  1992年   36篇
  1991年   47篇
  1990年   50篇
  1989年   48篇
  1988年   43篇
  1987年   35篇
  1986年   42篇
  1985年   32篇
  1984年   16篇
  1983年   17篇
  1982年   15篇
  1981年   17篇
  1980年   21篇
  1979年   16篇
  1978年   12篇
  1977年   12篇
  1976年   20篇
  1975年   22篇
排序方式: 共有3106条查询结果,搜索用时 15 毫秒
1.
2.
3.
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   
4.
5.
Introduction As many as one quarter of all cancer survivors report traumatic stress symptoms from cancer-related experiences. While the majority of these patients do not meet the criteria for posttraumatic stress disorder (PTSD), there is growing evidence that subsyndromal symptoms can significantly contribute to functional impairment and negative health outcomes. Treatment options for the hallmark symptoms of traumatic stress—unpleasant, intrusive thoughts and avoidant behaviors—have not been well investigated for the cancer survivorship population. Materials and methods Seven female cancer survivors with traumatic stress symptoms from cancer-related experiences and no other major psychopathology, were enrolled to receive three sessions of Neuro-Emotional Technique (NET), a brief, targeted treatment that combines traditional desensitization principles with complementary modalities. Results Psychological outcome measures (Impact of Event Scale (IES) and Subjective Units of Distress (SUD) and physiological measures (Heart Rate (HR) and Skin Conductance Level (SCL) demonstrated the following changes: 71% on IES, 88% SUD, 74% on HR, and 65% on SCL following the intervention. Statistically significant changes were observed for all four parameters, and effect size g for proportion improved were 0.50 each for IES, SUD, and HR, and 0.20 for SCL. Conclusions These cases suggest feasibility of the NET intervention for cancer-related traumatic stress and the potential for change in symptoms and physiological reactivity. Further investigation is needed to determine the specific and long-term effects of such an approach. Implications for cancer survivors Traumatic stress from cancer-related experiences might represent a constellation of symptoms that are amenable to brief, targeted interventions. This study was supported by the O.N.E. Research Foundation  相似文献   
6.
7.
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   
8.
9.
Infection of peripheral mononuclear blood cells by hepatitis C virus.   总被引:25,自引:0,他引:25  
We investigated the infection of peripheral blood mononuclear cells (PBMNC) by hepatitis C virus (HCV) in 5 patients with HCV-related chronic hepatitis. The presence of HCV-RNA-positive and -negative strands was tested with the polymerase chain reaction (PCR) method. In all subjects, HCV-RNA was shown in PBMNC. In 3 cases, HCV-RNA was shown in the T- and B-cell populations, with viral RNA also present in the monocyte-macrophage fraction of two of these. HCV-RNA-negative stranded molecules, indicative of the viral multiplication, were significantly increased in cells maintained in cultures with PHA/PMA stimulation. The results indicate that HCV infect blood mononuclear cells, thus suggesting that this cellular tropism may play a role in HCV infection.  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