全文获取类型
收费全文 | 2041篇 |
免费 | 93篇 |
国内免费 | 9篇 |
专业分类
耳鼻咽喉 | 12篇 |
儿科学 | 146篇 |
妇产科学 | 74篇 |
基础医学 | 207篇 |
口腔科学 | 28篇 |
临床医学 | 140篇 |
内科学 | 319篇 |
皮肤病学 | 52篇 |
神经病学 | 174篇 |
特种医学 | 105篇 |
外科学 | 459篇 |
综合类 | 22篇 |
一般理论 | 2篇 |
预防医学 | 70篇 |
眼科学 | 85篇 |
药学 | 155篇 |
中国医学 | 2篇 |
肿瘤学 | 91篇 |
出版年
2023年 | 12篇 |
2022年 | 44篇 |
2021年 | 74篇 |
2020年 | 38篇 |
2019年 | 63篇 |
2018年 | 80篇 |
2017年 | 33篇 |
2016年 | 47篇 |
2015年 | 51篇 |
2014年 | 54篇 |
2013年 | 68篇 |
2012年 | 124篇 |
2011年 | 139篇 |
2010年 | 82篇 |
2009年 | 50篇 |
2008年 | 105篇 |
2007年 | 85篇 |
2006年 | 65篇 |
2005年 | 67篇 |
2004年 | 88篇 |
2003年 | 64篇 |
2002年 | 69篇 |
2001年 | 40篇 |
2000年 | 39篇 |
1999年 | 37篇 |
1997年 | 17篇 |
1995年 | 19篇 |
1994年 | 15篇 |
1992年 | 14篇 |
1991年 | 30篇 |
1990年 | 23篇 |
1989年 | 17篇 |
1988年 | 22篇 |
1987年 | 24篇 |
1986年 | 24篇 |
1985年 | 22篇 |
1984年 | 17篇 |
1983年 | 18篇 |
1982年 | 13篇 |
1981年 | 17篇 |
1980年 | 14篇 |
1979年 | 21篇 |
1978年 | 16篇 |
1977年 | 15篇 |
1974年 | 13篇 |
1973年 | 13篇 |
1972年 | 13篇 |
1968年 | 17篇 |
1967年 | 16篇 |
1966年 | 16篇 |
排序方式: 共有2143条查询结果,搜索用时 15 毫秒
1.
Use of sonography to evaluate carotid atherosclerosis in the elderly. The Cardiovascular Health Study. CHS Collaborative Research Group 总被引:10,自引:0,他引:10
D H O'Leary J F Polak S K Wolfson M G Bond W Bommer S Sheth B M Psaty A R Sharrett T A Manolio 《Stroke; a journal of cerebral circulation》1991,22(9):1155-1163
Carotid sonography is being performed on more than 5,000 participants in the Cardiovascular Health Study, a prospective, multicenter study of cardiovascular disease in men and women aged 65 years and older. The sonographic methods used to examine and measure the extracranial carotid arteries are described. Initial validation studies were performed on 61 subjects with a mean age of 68.6 years. Analysis of within- and between-sonographer differences and between-reader differences were performed for selected variables. In general, the mean absolute differences for within- and between-sonographer comparisons were small, with even less variability between readers. Variability was less for the common carotid artery than for the internal carotid artery. These data suggest that carotid sonography is a reliable and reproducible method for use in the study of carotid atherosclerosis in population studies. 相似文献
2.
3.
4.
5.
Spontaneous gall bladder perforation in infants is rare. We report a 3-month-old male infant who presented with progressive abdominal distension, low-grade fever, bilateral hydrocele and acholic stools. Ultrasonography showed free fluid in the peritoneal cavity, which was bile-stained on paracentesis. Surgical exploration revealed sterile biliary peritonitis and a gangrenous gall bladder. Partial cholecystectomy with external biliary drainage resulted in satisfactory recovery. 相似文献
6.
7.
R S Shah D S Pardanani B G Parulkar S P Purohit A H Bandivdekar A R Sheth 《Archives of andrology》1988,20(2):137-140
Forty-five men presenting with erectile dysfunction were evaluated through history and nocturnal penile tumescence, Doppler, and EMG studies. Fifteen were classified as having organic and 30 as having psychogenic impotence. Three men had mild hypergonadotropism with low testosterone levels. One had hyperprolactinemia. No case of hypogonadotropic hypogonadism was detected. Six patients who had psychogenic impotence had low levels of testosterone. 相似文献
8.
9.
10.
Starship Children's Hospital in Auckland, New Zealand, serves a population of 1.2 million people and is a tertiary institution
for pediatric trauma. This study is designed to review all cases of abdominal injury (blunt and penetrating) that resulted
in injury of a hollow abdominal viscus including the stomach, duodenum, small intestine, large intestine and urinary bladder.
The mechanism of injury; diagnosis and outcome were studied. This was done by retrospective chart review of patients admitted
from January 1995 to December 2001. Thirty two injuries were found in 29 children. The age ranged from 7 months to 15 years
with boys represented more commonly. Small bowel was the most frequently injured hollow viscus. Computerized Tomography (CT
scan) is an extremely useful tool for the diagnosis of HVI. 相似文献