全文获取类型
收费全文 | 1554篇 |
免费 | 78篇 |
国内免费 | 12篇 |
专业分类
耳鼻咽喉 | 11篇 |
儿科学 | 135篇 |
妇产科学 | 76篇 |
基础医学 | 171篇 |
口腔科学 | 18篇 |
临床医学 | 118篇 |
内科学 | 216篇 |
皮肤病学 | 53篇 |
神经病学 | 174篇 |
特种医学 | 106篇 |
外科学 | 249篇 |
综合类 | 25篇 |
一般理论 | 1篇 |
预防医学 | 54篇 |
眼科学 | 63篇 |
药学 | 104篇 |
中国医学 | 1篇 |
肿瘤学 | 69篇 |
出版年
2021年 | 45篇 |
2020年 | 19篇 |
2019年 | 34篇 |
2018年 | 50篇 |
2017年 | 23篇 |
2016年 | 28篇 |
2015年 | 37篇 |
2014年 | 42篇 |
2013年 | 48篇 |
2012年 | 80篇 |
2011年 | 77篇 |
2010年 | 49篇 |
2009年 | 35篇 |
2008年 | 65篇 |
2007年 | 58篇 |
2006年 | 54篇 |
2005年 | 44篇 |
2004年 | 58篇 |
2003年 | 52篇 |
2002年 | 51篇 |
2001年 | 40篇 |
2000年 | 39篇 |
1999年 | 35篇 |
1997年 | 21篇 |
1996年 | 14篇 |
1995年 | 20篇 |
1994年 | 22篇 |
1993年 | 13篇 |
1992年 | 16篇 |
1991年 | 32篇 |
1990年 | 23篇 |
1989年 | 17篇 |
1988年 | 24篇 |
1987年 | 26篇 |
1986年 | 25篇 |
1985年 | 22篇 |
1984年 | 17篇 |
1983年 | 18篇 |
1982年 | 14篇 |
1981年 | 19篇 |
1980年 | 14篇 |
1979年 | 20篇 |
1978年 | 16篇 |
1977年 | 15篇 |
1974年 | 14篇 |
1973年 | 13篇 |
1972年 | 13篇 |
1968年 | 18篇 |
1967年 | 16篇 |
1966年 | 16篇 |
排序方式: 共有1644条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
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
5.
6.
Paediatric dacryocystorhinostomy 总被引:1,自引:0,他引:1
KN Hakin FRCS FRCOphth TJ Sullivan FRACO FRACS A Sharma FCOphth † RAN Welham FRCS FCOphth † 《Clinical & experimental ophthalmology》1994,22(4):231-235
Of 258 cases of dacryocystorhinostomy performed on children in the period September 1981 to September 1991, 130 were for simple, unresolved congenital nasolacrimal duct obstruction. Other indications for surgery included punctal agenesis, lacrimal fistula, post-traumatic and post-inflammatory canalicular obstruction. Of 177 children without canalicular pathology, 171 (96%) were relieved of symptoms with one operation, without canalicular intubation. Of 81 cases with canalicular disease, 55 of 70 (79%) who underwent DCR plus canalicular intubation, and 10 of 11 who underwent DCR plus Lester-Jones tube, were substantially improved with one operation. No child required peroperative or postoperative blood transfusion. Dacryocystorhinostomy in childhood, in experienced surgical hands, is a safe procedure, achieving relief of symptoms in most cases, particularly in the absence of canalicular disease. 相似文献
7.
8.
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
9.
10.