全文获取类型
收费全文 | 1506篇 |
免费 | 94篇 |
国内免费 | 43篇 |
专业分类
耳鼻咽喉 | 16篇 |
儿科学 | 85篇 |
妇产科学 | 48篇 |
基础医学 | 117篇 |
口腔科学 | 18篇 |
临床医学 | 140篇 |
内科学 | 244篇 |
皮肤病学 | 4篇 |
神经病学 | 68篇 |
特种医学 | 202篇 |
外科学 | 388篇 |
综合类 | 52篇 |
预防医学 | 91篇 |
眼科学 | 19篇 |
药学 | 75篇 |
中国医学 | 1篇 |
肿瘤学 | 75篇 |
出版年
2021年 | 6篇 |
2020年 | 10篇 |
2019年 | 20篇 |
2018年 | 20篇 |
2017年 | 14篇 |
2016年 | 19篇 |
2015年 | 23篇 |
2014年 | 35篇 |
2013年 | 48篇 |
2012年 | 42篇 |
2011年 | 36篇 |
2010年 | 42篇 |
2009年 | 36篇 |
2008年 | 61篇 |
2007年 | 74篇 |
2006年 | 54篇 |
2005年 | 57篇 |
2004年 | 33篇 |
2003年 | 37篇 |
2002年 | 45篇 |
2001年 | 38篇 |
2000年 | 26篇 |
1999年 | 44篇 |
1998年 | 44篇 |
1997年 | 39篇 |
1996年 | 47篇 |
1995年 | 38篇 |
1994年 | 52篇 |
1993年 | 29篇 |
1992年 | 33篇 |
1991年 | 21篇 |
1990年 | 26篇 |
1989年 | 50篇 |
1988年 | 54篇 |
1987年 | 55篇 |
1986年 | 35篇 |
1985年 | 34篇 |
1984年 | 31篇 |
1983年 | 22篇 |
1982年 | 16篇 |
1981年 | 18篇 |
1980年 | 11篇 |
1979年 | 20篇 |
1978年 | 12篇 |
1977年 | 8篇 |
1976年 | 12篇 |
1975年 | 13篇 |
1974年 | 13篇 |
1973年 | 14篇 |
1972年 | 18篇 |
排序方式: 共有1643条查询结果,搜索用时 15 毫秒
1.
G. Goldstein R. Reznik H. Lapsley Y. Cass 《Australian and New Zealand journal of public health》1986,10(1):31-38
Estimating the economic costs of a disease is an important prerequisite to determining the costs and benefits of various preventive programs. For preventive programs, incidence-based costing is a more appropriate means of estimation than is prevalence-based costing. In this study the cost of acute myocardial infarction (AMI) in New South Wales has been estimated using an incidence-based approach. The calculated cost of AMI in 1979 was $301.0 million, made up of $32.3 million as direct costs and $268.7 million as indirect costs. In a sensitivity analysis, the cost was shown to be most sensitive to the incidence of AMI, the discount rate, and the assumption of a wage for housework. Both the direct costs and indirect costs per case are substantially higher in the United States than in Australia, and this reflects higher physician charges, higher hospital costs, and in the case of indirect costs, higher average weekly earnings. 相似文献
2.
3.
4.
5.
SUMMARY A case congenital dislocation of both knees and dislocation of the left hip in an infant whose mother had a chronic amniotic fluid leakage after mid-trimester amniocentesis. 相似文献
6.
7.
8.
9.
R. H. Mount R. P. Hastings S. Reilly H. Cass & T. Charman 《Journal of intellectual disability research : JIDR》2002,46(8):619-624
Background Despite considerable interest in the genetic, physical and neurological aspects of Rett syndrome (RS), there have been few studies of associated behavioural and emotional features. Furthermore, few case studiesor surveys have included adult women with RS. The main aim of the present study was to compare behaviour problems in a sample of women with RS against data from normative samples. Methods The primary carers of 50 women with RS completed the community version of the Aberrant Behavior Checklist. Results Women with RS were rated as having lower levels of irritability, hyperactivity and inappropriate speech behaviours than normative samples of adults with intellectual disability. Conclusions A number of factors may affect the presentation of behaviour problems in women with RS (e.g. cognitive impairments or physical disabilities). Therefore, more research is needed in order to generate information about the behavioural phenotype of RS. The implications of the present data for future research are also discussed. 相似文献
10.
高效液相色谱法测定右旋儿茶素血浆浓度及药代动力学参数 总被引:1,自引:0,他引:1
本文建立了体液中右旋儿茶素的RP-HPLC测定方法。采用C_(18)键合相硅胶为填料的固相提取柱进行样品预处理,右旋儿茶素的提取回收率为79.8%.应用二极管阵列检测器对色谱峰纯度进行鉴定。该法精密度好,方法回收率近100%,日内、日间的变异系数为2.4~5.6%,血浓69.6~1160 ng/ml范围内呈线性关系,r=0.9993。家兔静注右旋儿茶素18mg/kg,其药代动力学过程符合二室模型,分布相半衰期为0.129 h,消除相半衰期为1.19h。 相似文献