全文获取类型
收费全文 | 3340篇 |
免费 | 237篇 |
国内免费 | 53篇 |
专业分类
耳鼻咽喉 | 12篇 |
儿科学 | 72篇 |
妇产科学 | 72篇 |
基础医学 | 358篇 |
口腔科学 | 34篇 |
临床医学 | 540篇 |
内科学 | 596篇 |
皮肤病学 | 91篇 |
神经病学 | 394篇 |
特种医学 | 75篇 |
外科学 | 367篇 |
综合类 | 97篇 |
一般理论 | 4篇 |
预防医学 | 495篇 |
眼科学 | 49篇 |
药学 | 230篇 |
中国医学 | 9篇 |
肿瘤学 | 135篇 |
出版年
2023年 | 35篇 |
2022年 | 20篇 |
2021年 | 55篇 |
2020年 | 43篇 |
2019年 | 60篇 |
2018年 | 75篇 |
2017年 | 65篇 |
2016年 | 77篇 |
2015年 | 99篇 |
2014年 | 125篇 |
2013年 | 163篇 |
2012年 | 242篇 |
2011年 | 259篇 |
2010年 | 155篇 |
2009年 | 147篇 |
2008年 | 229篇 |
2007年 | 217篇 |
2006年 | 222篇 |
2005年 | 202篇 |
2004年 | 172篇 |
2003年 | 154篇 |
2002年 | 141篇 |
2001年 | 37篇 |
2000年 | 30篇 |
1999年 | 44篇 |
1998年 | 50篇 |
1997年 | 32篇 |
1996年 | 38篇 |
1995年 | 36篇 |
1994年 | 23篇 |
1993年 | 25篇 |
1992年 | 27篇 |
1991年 | 16篇 |
1990年 | 11篇 |
1989年 | 14篇 |
1988年 | 15篇 |
1987年 | 22篇 |
1986年 | 25篇 |
1985年 | 16篇 |
1984年 | 15篇 |
1983年 | 15篇 |
1982年 | 18篇 |
1981年 | 18篇 |
1980年 | 19篇 |
1979年 | 10篇 |
1978年 | 9篇 |
1977年 | 16篇 |
1976年 | 11篇 |
1973年 | 8篇 |
1966年 | 7篇 |
排序方式: 共有3630条查询结果,搜索用时 15 毫秒
51.
M. A. H. Russell F.R.C.P. R. J. West Ph.D M. J. Jarvis M.Phil. 《Addiction (Abingdon, England)》1985,80(2):201-206
To estimate nicotine intake from passive smoking, six subjects received slow intravenous infusions of known doses of nicotine at a steady rate over one hour. The plasma and urinary nicotine concentrations produced by the infusions were compared with those found in previous studies of non-smokers exposed to tobacco smoke, in non-smokers in the general population, and in smokers during and after smoking their first cigarette of the day. It was estimated that the average rate of nicotine absorption was 0.23 mg/hr in a group of non-smokers exposed in a poorly ventilated public house, 0.36 mg/hr in non-smokers exposed to more extreme conditions in a smoke-filled unventilated room, and that the average daily-life exposure of a sample of 188 urban non-smokers was 0.014 mg nicotine per hour. In contrast, the dose absorbed by three smokers from their first cigarette of the day averaged 1.4 mg nicotine. The results indicate that when passive exposure of non-smokers results in carbon monoxide intake equivalent to the active smoking of one cigarette, the amount of nicotine absorbed is much less - equivalent to about one third of a cigarette dose. In view of the small samples and various assumptions in deriving these estimates, they can only be viewed as approximate. 相似文献
52.
53.
Isao Ohsawa Daisuke Honda Yusuke Suzuki Tomoo Fukuda Keisuke Kohga Eishin Morita Shinichi Moriwaki Osamu Ishikawa Yoshihiro Sasaki Masaki Tago Greg Chittick Melanie Cornpropst Sharon C. Murray Sylvia M. Dobo Eniko Nagy Sharon Van Dyke Lacy Reese Jessica M. Best Heather Iocca Phil Collis William P. Sheridan Michihiro Hide 《Allergy》2021,76(6):1789-1799
54.
Je Sung You Yong Eun Chung Song-Ee Baek Sung Phil Chung Myeong-Jin Kim 《Korean journal of radiology》2015,16(6):1197-1206
Liposuction is one of the most frequently performed cosmetic surgeries worldwide for reshaping the body contour. Although liposuction is minimally invasive and relatively safe, it is a surgical procedure, and it carries the risk of major and minor complications. These complications vary from postoperative nausea to life-threatening events. Common complications include infection, abdominal wall injury, bowel herniation, bleeding, haematoma, seroma, and lymphoedema. Life-threatening complications such as necrotizing fasciitis, deep vein thrombosis, and pulmonary embolism have also been reported. In this paper, we provide a brief introduction to liposuction with the related anatomy and present computed tomography and ultrasonography findings of a wide spectrum of postoperative complications associated with liposuction. 相似文献
55.
Background:Many pediatric forearm fractures can be treated in plaster following closed reduction. The cast index (CI, a ratio of anteroposterior to lateral internal diameters of the cast at the fracture site) is a simple, reliable marker of quality of molding and a CI of >0.8 correlates with increased risk of redisplacement. Previously, CI has been applied to all forearm fractures. We hypothesize that an acceptable CI is more difficult to achieve and does not predict outcome in fractures of the proximal forearm.Results:The mean CI was 0.77. Remanipulation was required in five cases (6%), all distal half fractures – mean CI 0.79. CI was higher in proximal half forearm fractures (0.83 vs. 0.76, P = 0.006), nonetheless these fractures did not re-displace more than distal fractures.Conclusion:Cast index is useful in predicting redisplacement of manipulated distal forearm fractures. We found that in proximal half forearm fractures it is difficult to achieve a CI of <0.8, but increased CI does not predict loss of position in these fractures. We therefore discourage the use of CI in proximal half forearm fractures. 相似文献
56.
57.
58.
Lynsey C. Patrott B. App Sc Sp.Path Wilfred G. Selley F.D.S. F. C. S. T. Hon Wendy A. Brooks B.Sc. Penny C. Lethbridge S.R.N. Jessica J. Cole M.C.S.P. Frederick C. Flack Ph.D. Richard E. Ellis M.Phil. John H. Tripp F.R.C.P. M.D. 《Dysphagia》1992,7(4):209-219
Eighteen children with cerebral palsy in a special school, most of whom had feeding difficulties, were studied to compare
the diagnostic value of the Exeter Dysphagia Assessment Technique (EDAT) with an exhaustive clinical assessment undertaken
by a multidisciplinary team experienced in the diagnosis and treatment of dysphagia of neurological origin. Four feeding skills
were assessed by each method independently, viz. anticipation, intraoral sensory perception, oral-motor efficiency, and pharyngeal
triggering. Comparison of the two sets of results showed agreement in at least 78% of the assessed skills. The possible reasons
for the few discrepancies are discussed. The noninvasive EDAT equipment was easy to use with the children, who had a range
of type and severity of cerebral palsy. The test was undertaken in their familiar surroundings and took 15 to 20 min per child.
Interpretation of the results showed that EDAT provided a rapid, reliable diagnostic aid which assisted in the assessment
of the degree of feeding impairment within each of the four feeding skills tested.
The authors are very grateful for the financial support for this project which was provided partially by Action Research and
partially by the Northcott Devon Medical Foundation 相似文献
59.
Haotian Gu Sahrai Saeed Andrii Boguslavskyi Gerald Carr-White John B. Chambers Phil Chowienczyk 《JACC: Cardiovascular Imaging》2019,12(1):52-63