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   1664篇
  免费   121篇
  国内免费   11篇
耳鼻咽喉   1篇
儿科学   117篇
妇产科学   15篇
基础医学   127篇
口腔科学   42篇
临床医学   250篇
内科学   414篇
皮肤病学   15篇
神经病学   44篇
特种医学   261篇
外科学   209篇
综合类   38篇
预防医学   94篇
眼科学   14篇
药学   69篇
  1篇
肿瘤学   85篇
  2021年   9篇
  2020年   8篇
  2019年   12篇
  2018年   17篇
  2017年   18篇
  2016年   16篇
  2015年   35篇
  2014年   36篇
  2013年   44篇
  2012年   60篇
  2011年   53篇
  2010年   62篇
  2009年   77篇
  2008年   52篇
  2007年   43篇
  2006年   44篇
  2005年   34篇
  2004年   37篇
  2003年   38篇
  2002年   40篇
  2001年   33篇
  2000年   27篇
  1999年   42篇
  1998年   89篇
  1997年   89篇
  1996年   94篇
  1995年   65篇
  1994年   57篇
  1993年   49篇
  1992年   32篇
  1991年   34篇
  1990年   24篇
  1989年   55篇
  1988年   45篇
  1987年   48篇
  1986年   33篇
  1985年   43篇
  1984年   23篇
  1983年   22篇
  1982年   17篇
  1981年   18篇
  1980年   11篇
  1979年   13篇
  1978年   7篇
  1977年   10篇
  1976年   16篇
  1975年   12篇
  1970年   5篇
  1968年   5篇
  1966年   5篇
排序方式: 共有1796条查询结果,搜索用时 31 毫秒
1.
2.
3.
The most common cause of illness in infancy and childhood is acute infection of the respiratory tract. Several recent studies have reported that life-threatening respiratory disease in infancy, such as pneumonia and bronchiolitis, is directly related to the smoking habits of parents. The effects of smoking are more hazardous to youngsters because babies and young children breathe more rapidly than adults. Because of this higher breathing rate, they inhale more air—and more pollution—in comparison to their total body weight. The harmful effects of cigarette smoking on infants and children and recommendations for specific interventions to minimize or eliminate this health hazard are discussed.  相似文献   
4.
Resection of the adrenal glands precludes participation in many immunotherapy protocols for metastatic renal cell carcinoma. We performed radical nephrectomy with adrenalectomy and contralateral partial adrenalectomy, including adrenal vein ligation for a 4 cm. hilar metastasis without perioperative complications or local recurrence after 30 months. Adrenal function, measured by cosyntropin stimulation tests 6 weeks and 10 months postoperatively, was normal. Partial adrenalectomy with preservation of adrenal function is possible.  相似文献   
5.

Background  

The aims of this study were to examine the extent to which higher intellectual abilities protect higher socio-economic groups from functional decline and to examine whether the contribution of intellectual abilities is independent of childhood deprivation and low birth weight and other socio-economic and developmental factors in early life.  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.
Previous reports in the literature have described correlation of increasing repeat length with severity of the phenotype, in Kennedy syndrome. We describe male siblings with different repeat lengths, with lack of expression of the phenotype in the sibling with the longer repeat length. The phenotype was identical to motor neurone disease. There is variability of expression in Kennedy syndrome and repeat length even in siblings cannot be taken as a conclusive indicator of severity. CAG repeat length cannot be used to predict the natural history of Kennedy disease. The diagnosis of Kennedy syndrome should be considered in male patients presenting with atypical motor neurone disease.  相似文献   
9.
SUMMARY The interferons are natural glycoproteins secreted in response to various stimuli, including viral infection. They have antiviral, antiproliferative and immunomodulatory effects on different target cell populations. Since recombinant human interferons have become available, they have been tested in a wide range of malignancies. They are well established in the treatment of hairy cell leukaemia, chronic myelogenous leukaemia and multiple myeloma. Although they have documented activity against lymphoma, melanoma, renal cell cancer and carcinoid tumours, their role in the treatment of these tumours is less clear. In the common solid tumours, such as lung cancer and colorectal cancer, the use of interferons remains experimental. Here we will summarise their practice applications in oncology, using randomised studies where available to establish their place in multi-modality treatment. We will not discuss their use as antiviral or immunomodulating agents in viral and autoimmune diseases, multiple sclerosis or after organ transplantation.  相似文献   
10.
Chronic low back pain: comparison of bone SPECT with radiography and CT   总被引:1,自引:0,他引:1  
Ryan  PJ; Evans  PA; Gibson  T; Fogelman  I 《Radiology》1992,182(3):849
  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