全文获取类型
收费全文 | 562篇 |
免费 | 41篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 74篇 |
妇产科学 | 7篇 |
基础医学 | 65篇 |
口腔科学 | 11篇 |
临床医学 | 77篇 |
内科学 | 137篇 |
皮肤病学 | 19篇 |
神经病学 | 26篇 |
特种医学 | 94篇 |
外科学 | 23篇 |
综合类 | 10篇 |
预防医学 | 18篇 |
眼科学 | 1篇 |
药学 | 24篇 |
中国医学 | 1篇 |
肿瘤学 | 16篇 |
出版年
2023年 | 2篇 |
2022年 | 5篇 |
2020年 | 1篇 |
2019年 | 4篇 |
2018年 | 8篇 |
2017年 | 10篇 |
2016年 | 8篇 |
2015年 | 17篇 |
2014年 | 11篇 |
2013年 | 27篇 |
2012年 | 13篇 |
2011年 | 18篇 |
2010年 | 32篇 |
2009年 | 19篇 |
2008年 | 17篇 |
2007年 | 11篇 |
2006年 | 12篇 |
2005年 | 11篇 |
2004年 | 6篇 |
2003年 | 5篇 |
2002年 | 10篇 |
2001年 | 9篇 |
2000年 | 4篇 |
1999年 | 9篇 |
1998年 | 22篇 |
1997年 | 31篇 |
1996年 | 27篇 |
1995年 | 31篇 |
1994年 | 23篇 |
1993年 | 37篇 |
1992年 | 6篇 |
1991年 | 8篇 |
1990年 | 15篇 |
1989年 | 16篇 |
1988年 | 17篇 |
1987年 | 11篇 |
1986年 | 13篇 |
1985年 | 13篇 |
1984年 | 3篇 |
1983年 | 4篇 |
1982年 | 6篇 |
1981年 | 14篇 |
1980年 | 6篇 |
1979年 | 2篇 |
1978年 | 5篇 |
1977年 | 7篇 |
1976年 | 12篇 |
1975年 | 4篇 |
1968年 | 1篇 |
1957年 | 1篇 |
排序方式: 共有604条查询结果,搜索用时 421 毫秒
31.
Evaluation of attempted prevention of unexpected infant death in very high-risk infants by planned health care 总被引:1,自引:0,他引:1
Three hundred and ninety-six babies born in Sheffield between 1982 and 1990 identified as being at "very high risk" of unexpected infant death by means of a scoring system, received an intensive programme of health care including a case discussion between a paediatrician, the GP and the health visitor held in the family doctor's surgery, weekly visits from the health visitor and informal hospital admission. Significantly fewer sudden unexpected infant deaths occurred in this group than were expected by logistic regression anlysis or occurred in the best available control group with comparable scores ( p = 0.024). Problems in evaluation include identification of an adequate control population, ethical difficulties in introducing a controlled study when the programme is already perceived as effective, and the calculation of "expected death rates". The results of this study indicate that very energetic programmes of intervention may prevent some deaths in vulnerable infants. 相似文献
32.
Radiographs, computed tomograms, and radionuclide bone scans were obtained preoperatively in three children with fibromatosis involving the bones and soft tissues of the extremities. Two of the children had identical scar-like bone lesions of the proximal tibia, which, to the authors' knowledge, have not been reported before in this disease. The lesions recurred in two children. 相似文献
33.
34.
35.
Computed tomography of abdominal fatty masses 总被引:2,自引:0,他引:2
36.
37.
38.
In an infant with Menkes's steely-hair syndrome, early treatment (from 21 days of age) with parenteral copper failed to halt the disease. In addition to urinary tract abnormalities, panlobular emphysema was present a finding not previously noted in the syndrome. 相似文献
39.
A history of pet contact and/or apparent clinical sensitivity was obtained in 65 (55%) of 118 unselected asthmatic children. These 65 children were skin tested and their sera examined for specific IgE using the radioallergosorbent test. Those children who had apparent clinical sensitivities had larger skin test reactions and were more likely to have positive specific IgE results than those without apparent sensitivities. Positive skin tests were very common (80%), but the larger the skin test reaction (weal diameter greater than 4 mm diameter) the more likely was there to be a positive history or a positive specific IgE result. Hence a large skin test reaction can provide a helpful pointer to animal allergy of clinical importance. Commercially available animal extracts have limitations for diagnostic tests. A questionnaire survey of 150 day schools emphasized the potential opportunities for contact with animal allergens at school. 相似文献
40.
口服Carvedilol治疗心力衰竭多中心研究(MOCHA) 总被引:1,自引:0,他引:1
标题 Carvedilol对慢性心力衰竭患者左心室功能的改善和存活的提高呈剂量相关性作者 BristowMR,GilbertEM,AbrahamWT,等 Circulation1996,94:2807~2816 研究疾病:充血性心力衰竭。目的:对Carvedilol治疗慢性心力衰竭患者剂量-疗效特征进行评价。 设计:随机、双盲、安慰剂对照的多中心研究,剂量效应关系研究。病人资料:共345名心力衰竭患者,年龄18~85岁,左室射血分数≤0-35,心力衰竭症状时间≥3月,研究前所有患者必须用利… 相似文献