全文获取类型
收费全文 | 2036篇 |
免费 | 193篇 |
国内免费 | 19篇 |
专业分类
耳鼻咽喉 | 3篇 |
儿科学 | 166篇 |
妇产科学 | 21篇 |
基础医学 | 250篇 |
口腔科学 | 79篇 |
临床医学 | 221篇 |
内科学 | 372篇 |
皮肤病学 | 99篇 |
神经病学 | 119篇 |
特种医学 | 258篇 |
外科学 | 152篇 |
综合类 | 54篇 |
一般理论 | 1篇 |
预防医学 | 175篇 |
眼科学 | 17篇 |
药学 | 98篇 |
1篇 | |
肿瘤学 | 162篇 |
出版年
2022年 | 19篇 |
2021年 | 20篇 |
2020年 | 21篇 |
2019年 | 22篇 |
2018年 | 36篇 |
2017年 | 25篇 |
2016年 | 22篇 |
2015年 | 45篇 |
2014年 | 43篇 |
2013年 | 81篇 |
2012年 | 76篇 |
2011年 | 71篇 |
2010年 | 80篇 |
2009年 | 70篇 |
2008年 | 55篇 |
2007年 | 75篇 |
2006年 | 50篇 |
2005年 | 68篇 |
2004年 | 52篇 |
2003年 | 64篇 |
2002年 | 54篇 |
2001年 | 53篇 |
2000年 | 45篇 |
1999年 | 59篇 |
1998年 | 98篇 |
1997年 | 86篇 |
1996年 | 70篇 |
1995年 | 66篇 |
1994年 | 51篇 |
1993年 | 50篇 |
1992年 | 18篇 |
1991年 | 41篇 |
1990年 | 36篇 |
1989年 | 73篇 |
1988年 | 56篇 |
1987年 | 43篇 |
1986年 | 32篇 |
1985年 | 32篇 |
1984年 | 24篇 |
1983年 | 17篇 |
1982年 | 18篇 |
1981年 | 20篇 |
1980年 | 20篇 |
1979年 | 13篇 |
1978年 | 24篇 |
1977年 | 15篇 |
1976年 | 15篇 |
1975年 | 16篇 |
1973年 | 14篇 |
1968年 | 11篇 |
排序方式: 共有2248条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
Pyomyositis: characteristics at CT and MR imaging 总被引:9,自引:0,他引:9
5.
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
6.
BACKGROUND: Paediatric audiology services and screening programmes are currently under review. AIMS AND METHODS: To investigate current practice and performance of the school hearing screening programme (SHSP) by means of a questionnaire. RESULTS: SHSP was found to detect previously unrecognised hearing loss at low cost. Wide variation in practice was shown, and the majority of services had no computerised system for data collection. CONCLUSION: There is a need for nationally agreed protocols and quality assurance procedures. 相似文献
7.
8.
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
9.
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
10.
The long-term consequences for infants with problems of feeding and crying behavior remain unknown. The purpose of this research was to determine whether such children are later perceived by their parents as vulnerable and more often have behavior problems and have different personalities than children without problems in infancy. The implications of managing such problems by changing milk formulas is explored. Mothers of 379 infants were enrolled in the postpartum period. Information about problems of feeding and crying behavior was obtained at 4 months. Thirty-six percent of the infants had problems and the formula had been changed for 17%. At 3 1/2 years, 320 (84%) mothers completed a questionnaire. Children who had had problems were more often perceived as vulnerable (relative risk [RR] 1.86; 95% confidence interval [CI] 1.09, 3.19) and more often had behavior problems (RR 1.78; 95% CI 1.03, 3.07). There were no differences in personality. Children whose problems had been managed by changing milk formulas were more often perceived as vulnerable (RR 2.18; 95% CI 1.05, 4.53). Although allergies were reported significantly more often for those children who had had problems, there were no differences in the prevalence of asthma or eczema. Problems of feeding and crying behavior in early infancy and the way they are managed may have long-term implications for the child. 相似文献