全文获取类型
收费全文 | 584篇 |
免费 | 21篇 |
国内免费 | 96篇 |
专业分类
耳鼻咽喉 | 2篇 |
儿科学 | 33篇 |
基础医学 | 42篇 |
口腔科学 | 19篇 |
临床医学 | 138篇 |
内科学 | 139篇 |
皮肤病学 | 7篇 |
神经病学 | 8篇 |
特种医学 | 108篇 |
外科学 | 36篇 |
综合类 | 35篇 |
预防医学 | 24篇 |
眼科学 | 4篇 |
药学 | 80篇 |
肿瘤学 | 26篇 |
出版年
2023年 | 3篇 |
2022年 | 2篇 |
2021年 | 7篇 |
2020年 | 3篇 |
2019年 | 5篇 |
2018年 | 4篇 |
2017年 | 4篇 |
2016年 | 5篇 |
2015年 | 4篇 |
2014年 | 10篇 |
2013年 | 23篇 |
2012年 | 21篇 |
2011年 | 12篇 |
2010年 | 32篇 |
2009年 | 26篇 |
2008年 | 13篇 |
2007年 | 59篇 |
2006年 | 15篇 |
2005年 | 23篇 |
2004年 | 4篇 |
2003年 | 7篇 |
2002年 | 8篇 |
2001年 | 17篇 |
2000年 | 7篇 |
1999年 | 9篇 |
1998年 | 41篇 |
1997年 | 38篇 |
1996年 | 29篇 |
1995年 | 29篇 |
1994年 | 27篇 |
1993年 | 38篇 |
1992年 | 7篇 |
1991年 | 7篇 |
1990年 | 13篇 |
1989年 | 26篇 |
1988年 | 24篇 |
1987年 | 15篇 |
1986年 | 16篇 |
1985年 | 15篇 |
1984年 | 9篇 |
1983年 | 5篇 |
1982年 | 7篇 |
1981年 | 5篇 |
1980年 | 10篇 |
1979年 | 3篇 |
1978年 | 3篇 |
1977年 | 8篇 |
1976年 | 2篇 |
1975年 | 1篇 |
排序方式: 共有701条查询结果,搜索用时 0 毫秒
1.
Digital radiography of subtle pulmonary abnormalities: an ROC study of the effect of pixel size on observer performance 总被引:3,自引:0,他引:3
Forty conventional radiographs with examples of mild interstitial infiltrates and subtle pneumothoraces and 40 normal studies of the chest were selected and digitized, with pixel sizes of 1.0, 0.5, 0.2, and 0.1 mm. Observer performance tests were carried out using receiver operating characteristic analysis. Conventional radiographs and digitized images were compared. The results indicate that, in such cases, diagnostic accuracy increases significantly as the pixel size is reduced, at least to the 0.1-mm level. We conclude that, for digital systems using screen-film or similar image receptors, use of a pixel size substantially larger than 0.1 mm may result in some loss of diagnostic accuracy. 相似文献
2.
3.
Wang WS; Hsieh RK; Chiou TJ; Liu JH; Fan FS; Yen CC; Tung SL; Chen PM 《Japanese journal of clinical oncology》1998,28(9):551-554
A 54-year-old man was treated with weekly 24-h infusion of high-dose
5-fluorouracil (2600 mg/m2) and leucovorin (100 mg/m2) for metastatic colon
cancer. At first, he tolerated the treatment well and no significant
toxicity was identified. After a total of eight courses of treatment, a
stable disease was observed, but mild shortness of breath was found on
occasion. The patient had no previous history of cardiac disease and the
heart performance assessed by left ventricular ejection fraction before
treatment was normal. Unfortunately, acute pulmonary edema with lethal
cardiogenic shock occurred during the ninth course of treatment, in spite
of intensive medical treatment. The chest X-ray showed extreme
cardiomegaly. Repeated assessment of his heart function by echocardiogram
and ventricular ejection fraction revealed a very poor cardiac performance.
Toxic cardiogenic shock during weekly 24-h infusion of high-dose
5-fluorouracil and leucovorin is extremely rare. To the best of our
knowledge, no case has been reported in the English literature. We report a
case and the relevant literature about the incidence, clinical picture and
possible pathophysiology on 5-fluorouracil-related cardioxicity is
reviewed.
相似文献
4.
With the growth of wheelchair athletics at both grassroots and national levels, there has been an increased incidence of sports-related and overuse syndromes in the wheelchair-user population. This article provides an overview of the available literature on the incidence, prevalence, evaluation, prevention, and rehabilitative management of these types of clinical syndromes. 相似文献
5.
6.
7.
8.
9.
Abstract: The prevalence of Parkinson’s disease (PD) is expected to double over the next 20 years owing to the increase in life expectancy. This progressive disease has several implications relating to oral health, and many are manageable with proper awareness and knowledge about the disease. This article reviews the epidemiology, pathophysiology, and characteristics of PD, as well as the treatments and oral health considerations to enable dental hygienists to undertake an informed approach to patient management strategies and provide optimal care. 相似文献
10.
J Tang DJ Humes E Gemmil NT Welch SL Parsons JA Catton 《Annals of the Royal College of Surgeons of England》2013,95(5):323-328