全文获取类型
收费全文 | 1226篇 |
免费 | 98篇 |
国内免费 | 19篇 |
专业分类
儿科学 | 79篇 |
妇产科学 | 9篇 |
基础医学 | 148篇 |
口腔科学 | 66篇 |
临床医学 | 129篇 |
内科学 | 211篇 |
皮肤病学 | 75篇 |
神经病学 | 46篇 |
特种医学 | 244篇 |
外科学 | 113篇 |
综合类 | 30篇 |
预防医学 | 67篇 |
眼科学 | 13篇 |
药学 | 37篇 |
1篇 | |
肿瘤学 | 75篇 |
出版年
2023年 | 4篇 |
2022年 | 4篇 |
2021年 | 7篇 |
2020年 | 13篇 |
2019年 | 15篇 |
2018年 | 20篇 |
2017年 | 11篇 |
2016年 | 14篇 |
2015年 | 28篇 |
2014年 | 26篇 |
2013年 | 48篇 |
2012年 | 37篇 |
2011年 | 26篇 |
2010年 | 61篇 |
2009年 | 59篇 |
2008年 | 31篇 |
2007年 | 43篇 |
2006年 | 32篇 |
2005年 | 37篇 |
2004年 | 22篇 |
2003年 | 35篇 |
2002年 | 25篇 |
2001年 | 18篇 |
2000年 | 16篇 |
1999年 | 33篇 |
1998年 | 82篇 |
1997年 | 77篇 |
1996年 | 62篇 |
1995年 | 53篇 |
1994年 | 38篇 |
1993年 | 46篇 |
1992年 | 11篇 |
1991年 | 25篇 |
1990年 | 19篇 |
1989年 | 47篇 |
1988年 | 37篇 |
1987年 | 27篇 |
1986年 | 18篇 |
1985年 | 19篇 |
1984年 | 10篇 |
1983年 | 12篇 |
1982年 | 15篇 |
1981年 | 14篇 |
1980年 | 15篇 |
1979年 | 3篇 |
1978年 | 14篇 |
1977年 | 11篇 |
1976年 | 11篇 |
1975年 | 8篇 |
1954年 | 1篇 |
排序方式: 共有1343条查询结果,搜索用时 15 毫秒
1.
Occupational airborne allergic contact dermatitis from tylosin 总被引:2,自引:1,他引:1
2.
3.
Pyomyositis: characteristics at CT and MR imaging 总被引:9,自引:0,他引:9
4.
5.
D De AJ Kanwar S Handa 《Journal of the European Academy of Dermatology and Venereology》2006,20(7):853-859
BACKGROUND: Diagnosis of atopic dermatitis (AD) depends on clinical features because no definitive diagnostic test exists. Criteria proposed by Hanifin and Rajka (Acta Derm Venereol (Stockh) 1980; Suppl 92: 44-47) were acceptable for hospital-based studies but were found not to be suitable for field studies. A UK working party formulated clinical diagnostic criteria that could be used in both hospital and epidemiological settings. Validation studies of the criteria showed widely variable results, probably due to different clinical settings and ethnicity. AIM AND OBJECTIVE: This study was undertaken to validate Hanifin and Rajka's criteria and to assess the comparative efficacy of their criteria and the UK working party's diagnostic criteria in the diagnosis of AD in a hospital setting in North India. SUBJECTS AND METHODS: This study serially included 101 patients with AD and 48 controls of paediatric age group. The study period was from July 2003 to December 2004. RESULTS: Hanifin and Rajka's criteria (sensitivity 96%, specificity 93.75%, positive predictive value 97% (PPV) and negative predictive value (NPV) 91.84%) had a statistical advantage over the UK working party's diagnostic criteria (sensitivity 86%, specificity 95.83%, PPV 97.75% and NPV 76.67%), with a P-value < 0.005. 相似文献
6.
SUMMARY Impotence is a common symptom which can cause considerable distress to both the sufferer and his partner. The use of pharmacotherapy to improve erectile function will continue to increase as safe and effective drugs are developed. However, restoring erectile function should not be the only treatment objective. It is also essential to address personal and emotional factors in the sufferer, conflicts in his relationship with his partner, and sexual problems in his partner, all of which may be instrumental in causing or maintaining the presenting impotence. We advocate a combined approach with appropriate medical treatment and sex and couple therapy 相似文献
7.
8.
9.
The anticonflict effects of ethanol, diazepam and pentobarbital were evaluated in adult rats fed a low protein diet during the perinatal period in the plus-maze test, after single injections and following chronic ethanol administration (1 g.kg-1.d-1 for 30 d). Reactivity to the anticonflict effect of these drugs was similar in control and protein-deprived rats after acute treatment. After chronic ethanol administration, control rats showed tolerance to ethanol and cross-tolerance (i.e., lower reactivity) to the anxiolytic effect of diazepam and pentobarbital. Conversely, protein-deprived rats showed greater reactivity to ethanol and lack of cross-tolerance to diazepam and pentobarbital following chronic ethanol treatment. A significantly greater density of cortical gamma-aminobutyric acid receptors subtype A (GABA-A) was detected in protein-deprived rats after chronic ethanol administration compared with the density after chronic saline treatment, whereas no differences were observed in nourished controls. This suggests that the greater anxiolytic activity detected in protein-deprived rats may correlate with higher GABA-A receptor density. 相似文献
10.
Kuntal Patel Deemesh Oudit G Ross Caroline Nicolson AJ Howcroft 《CANADIAN JOURNAL OF PLASTIC SURGERY》2005,13(4):207-208
A lump on the midface of a child can pose as a diagnostic dilemma. There is a wide variety of possible differential diagnoses, ranging from simple benign conditions such as a sebaceous cyst, dermoid cyst, lipoma, neuroma and neurofibroma, to potentially devastating conditions such as odontogenic myxoma.A case of a child in which the formulation of a definite diagnosis was clinically and histologically challenging is presented. 相似文献