全文获取类型
收费全文 | 474篇 |
免费 | 17篇 |
国内免费 | 22篇 |
专业分类
儿科学 | 27篇 |
基础医学 | 43篇 |
口腔科学 | 9篇 |
临床医学 | 52篇 |
内科学 | 73篇 |
皮肤病学 | 3篇 |
神经病学 | 1篇 |
特种医学 | 184篇 |
外科学 | 24篇 |
综合类 | 2篇 |
预防医学 | 14篇 |
眼科学 | 7篇 |
药学 | 44篇 |
肿瘤学 | 30篇 |
出版年
2023年 | 1篇 |
2021年 | 4篇 |
2020年 | 1篇 |
2019年 | 1篇 |
2018年 | 4篇 |
2017年 | 1篇 |
2015年 | 2篇 |
2014年 | 2篇 |
2013年 | 12篇 |
2012年 | 2篇 |
2011年 | 4篇 |
2010年 | 11篇 |
2009年 | 9篇 |
2008年 | 8篇 |
2007年 | 22篇 |
2006年 | 8篇 |
2005年 | 13篇 |
2004年 | 7篇 |
2003年 | 6篇 |
2002年 | 3篇 |
2001年 | 9篇 |
2000年 | 5篇 |
1999年 | 3篇 |
1998年 | 32篇 |
1997年 | 44篇 |
1996年 | 25篇 |
1995年 | 27篇 |
1994年 | 19篇 |
1993年 | 12篇 |
1992年 | 3篇 |
1991年 | 8篇 |
1990年 | 10篇 |
1989年 | 19篇 |
1988年 | 25篇 |
1987年 | 16篇 |
1986年 | 18篇 |
1985年 | 22篇 |
1984年 | 10篇 |
1983年 | 8篇 |
1982年 | 16篇 |
1981年 | 7篇 |
1980年 | 15篇 |
1979年 | 6篇 |
1978年 | 7篇 |
1977年 | 8篇 |
1976年 | 14篇 |
1975年 | 4篇 |
排序方式: 共有513条查询结果,搜索用时 15 毫秒
71.
72.
73.
van Uden CJ Nieman FH Voss GB Wesseling G Winkens RA Crebolder HF 《BMC health services research》2005,5(1):27
Background
In recent years, Dutch general practitioner (GP) out-of-hours service has been reorganised into large-scale GP cooperatives. Until now little is known about GPs' experiences with working at these cooperatives for out-of-hours care. The purpose of this study is to gain insight into GPs' satisfaction with working at GP cooperatives for out-of-hours care in separated and integrated cooperatives. 相似文献74.
75.
CT模拟结肠镜在结肠病灶诊断中的应用 总被引:2,自引:0,他引:2
结肠癌是常见的消化道肿瘤,上海等地区的发病率有明显增高的趋势。在发达国家,结肠癌占肿瘤死亡率第二位,且与大肠腺瘤关系密切。如能早期发现有恶变先兆的息肉并切除之,可以预防结肠癌发生。目前,对结肠癌发病高危人群并未作大规模普查,部分由于患者缺乏早期主诉,或是由于现有普查手段不够有效。大便隐血试验只能发现30%~40%结肠肿瘤,乙状结肠镜不能进入近端结肠,并有10%~15%乙状结肠肿瘤漏诊。钡剂灌肠和结肠镜能检查全结肠,但有10%~15%患者行结肠镜检查失败,并且结肠镜可能使10%~20%病灶遗漏,尚… 相似文献
76.
77.
Eleven high risk fetuses between 32 and 37 menstrual weeks gestational age were examined by magnetic resonance (MR) imaging. Serial obstetrical sonograms, birth weights, and serial postnatal examinations were obtained in all subjects. Sagittal MR spin echo images obtained using TR = 0.5 sec and TE = 28 msec were useful for assessing subcutaneous fat. Prospective estimates of fetal fat stores correlated with neonatal outcome better than sonographic measurements of fetal growth parameters or actual birth weight. MR appears to be a safe and useful technique that offers information complementary to obstetrical sonography when IUGR is suspected. 相似文献
78.
79.
80.
GTA Jombo EM Mbaawuaga AN Gyuse MNO Enenebeaku EE Okwori EJ Peters S Akpan F Odey EA Etukumana JT Akosu 《Asian Pacific journal of tropical medicine》2010,3(5):402-406
ObjectiveTo ascertain the socio-cultural factors influencing the rate of utilization of insecticide treated bed nets (ITNs) in a malaria endemic city of Makurdi, north central Nigeria.MethodsThe study was cross-sectional in nature using systematic sampling method to identify households. Both quantitative and qualitative data was generated from adult women using structured and semi structured questionnaires, and focused group discussions (FGDs) to obtain information on rate and patterns of utilization of ITNs. Information such as age, educational level, marital status, awareness or otherwise of the existence of malaria, and factors influencing rate of ownership and utilization of ITNs were obtained. FGDs were used to obtain qualitative information on rate of utilization of ITNs not captured in the questionnaires. Data obtained was analysed using Epi Info 6 statistical software.ResultsAmong the respondents interviewed, 97.0% (2 013/2 075) were aware of existence of malaria and 87.0% of these (1 751/2 013) would associate it with mosquitoes. The rate of ownership of any bed net, ITNs and untreated bed nets (UTNs) was 25.1%, 17.0% and 8.3%, respectively. Utilization of ITNs among children was 30.0% (112/373) and UTNs 12.9% (48/373). Positive contributors to ITNs utilization were literacy, enhanced economy, experience of marriage, and being gainfully employed (P<0.05); while negative contributors were ignorance, poverty and some cultural beliefs and values.ConclusionsA more synchronized advocacy should be carried out on the potential benefits of ITNs utilization and sustained. Also ITNs should be made available to the people of the community at minimal or no cost. 相似文献