全文获取类型
收费全文 | 2660篇 |
免费 | 208篇 |
国内免费 | 24篇 |
专业分类
耳鼻咽喉 | 23篇 |
儿科学 | 111篇 |
妇产科学 | 55篇 |
基础医学 | 345篇 |
口腔科学 | 286篇 |
临床医学 | 231篇 |
内科学 | 464篇 |
皮肤病学 | 98篇 |
神经病学 | 102篇 |
特种医学 | 331篇 |
外科学 | 326篇 |
综合类 | 38篇 |
预防医学 | 167篇 |
眼科学 | 46篇 |
药学 | 130篇 |
1篇 | |
中国医学 | 22篇 |
肿瘤学 | 116篇 |
出版年
2024年 | 3篇 |
2023年 | 22篇 |
2022年 | 53篇 |
2021年 | 106篇 |
2020年 | 75篇 |
2019年 | 80篇 |
2018年 | 104篇 |
2017年 | 52篇 |
2016年 | 81篇 |
2015年 | 116篇 |
2014年 | 127篇 |
2013年 | 160篇 |
2012年 | 171篇 |
2011年 | 172篇 |
2010年 | 124篇 |
2009年 | 114篇 |
2008年 | 93篇 |
2007年 | 102篇 |
2006年 | 97篇 |
2005年 | 68篇 |
2004年 | 41篇 |
2003年 | 45篇 |
2002年 | 29篇 |
2001年 | 24篇 |
2000年 | 18篇 |
1999年 | 41篇 |
1998年 | 100篇 |
1997年 | 93篇 |
1996年 | 75篇 |
1995年 | 54篇 |
1994年 | 39篇 |
1993年 | 45篇 |
1992年 | 8篇 |
1991年 | 30篇 |
1990年 | 17篇 |
1989年 | 48篇 |
1988年 | 40篇 |
1987年 | 28篇 |
1986年 | 20篇 |
1985年 | 21篇 |
1984年 | 15篇 |
1983年 | 15篇 |
1982年 | 18篇 |
1981年 | 20篇 |
1980年 | 15篇 |
1979年 | 5篇 |
1978年 | 13篇 |
1977年 | 13篇 |
1976年 | 10篇 |
1975年 | 15篇 |
排序方式: 共有2892条查询结果,搜索用时 46 毫秒
1.
2.
3.
4.
Paulo Cezar Galv?o do Amaral Euler de Medeiros ázaro Filho Thales Delmondes Galv?o Ettinger Eric Junior Galeno Egydio José de Magalh?es Neto Fabrício Mascarenhas Edvaldo Fahel 《JSLS, Journal of the Society of Laparoendoscopic Surgeons》2006,10(3):355-358
BACKGROUND: Randomized studies demonstrate that laparoscopic appendectomy yields better results compared with open techniques. We sought to identify factors that determine an extended hospital stay among patients undergoing laparoscopic appendectomy. METHODS: This was a prospective study including 669 patients undergoing laparoscopic appendectomy. We analyzed variables that can predict the length of hospital stay. RESULTS: Of 669 patients undergoing laparoscopic appendectomy, 141 stayed in the hospital for > or = 5 days (Group 1), and 97 stayed in the hospital for < or = 1 day after surgery (Group 2). The univariate analysis demonstrated that fever (P<0.0001), nausea and vomiting (P=0.060), leukocytosis (P<0.0001), gangrened or perforated intraoperative appearance of the appendix (P<0.0001), and appendix position behind the ileocecal junction (P<0.001) were related to a longer hospital stay. The multivariate analysis through logistical regression showed that the factors independently and significantly associated with an extended hospital stay were presurgical fever, appendix position behind the ileocecal junction, and intraoperative gangrened or perforated appearance of the appendix. CONCLUSION: Fever, appearance, and position of the appendix are factors related to an extended hospital stay. 相似文献
5.
6.
Pyomyositis: characteristics at CT and MR imaging 总被引:9,自引:0,他引:9
7.
AJ Larner MRCP 《International journal of clinical practice》1994,48(5):272-274
SUMMARY A case is reported of pseudohyperphosphataemia in association with a monoclonal gammopathy of undetermined significance. 相似文献
8.
9.
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
10.
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