全文获取类型
收费全文 | 1805篇 |
免费 | 130篇 |
国内免费 | 10篇 |
学科分类
医药卫生 | 1945篇 |
出版年
2023年 | 11篇 |
2022年 | 10篇 |
2021年 | 21篇 |
2020年 | 12篇 |
2019年 | 20篇 |
2018年 | 27篇 |
2017年 | 15篇 |
2016年 | 35篇 |
2015年 | 65篇 |
2014年 | 42篇 |
2013年 | 61篇 |
2012年 | 56篇 |
2011年 | 62篇 |
2010年 | 54篇 |
2009年 | 52篇 |
2008年 | 74篇 |
2007年 | 63篇 |
2006年 | 68篇 |
2005年 | 56篇 |
2004年 | 46篇 |
2003年 | 63篇 |
2002年 | 57篇 |
2001年 | 60篇 |
2000年 | 48篇 |
1999年 | 43篇 |
1998年 | 37篇 |
1997年 | 55篇 |
1996年 | 47篇 |
1995年 | 42篇 |
1994年 | 36篇 |
1993年 | 32篇 |
1992年 | 34篇 |
1991年 | 40篇 |
1990年 | 31篇 |
1989年 | 55篇 |
1988年 | 43篇 |
1987年 | 36篇 |
1986年 | 36篇 |
1985年 | 24篇 |
1984年 | 41篇 |
1983年 | 25篇 |
1982年 | 19篇 |
1981年 | 13篇 |
1980年 | 12篇 |
1979年 | 15篇 |
1977年 | 18篇 |
1976年 | 9篇 |
1973年 | 9篇 |
1972年 | 9篇 |
1967年 | 8篇 |
排序方式: 共有1945条查询结果,搜索用时 15 毫秒
1.
2.
The nation's policy on aging has not adequately addressed the disjuncture between the compelling increase in the number of aged and the changing family and social roles of women. There is a continuum of mid-life, aged and very old women engaged in inter-generational exchange of care, who have unmet needs both as care givers and care receivers. Shortcomings in public policy arrangements are discussed, along with proposals for a national policy on aging that focuses on the family as a caring unit. 相似文献
3.
The techniques specific to peroperative fluorocholangiography are discussed based on an experience of 632 cholangiograms and an estimation has been made of the associated radiation doses to staff and patients. Rapid and accurate information can be obtained during fluorocholangiography using appropriate techniques with acceptably low radiation hazards. 相似文献
4.
5.
6.
G D Faulkner 《Journal of cataract and refractive surgery》1987,13(6):649-652
Central corneal endothelial cell loss was compared following primary insertion of folded posterior chamber silicone intraocular lenses (IOLs) in 29 eyes and Sinskey-style polymethylmethacrylate posterior chamber IOLs in 20 eyes. Cataracts were removed by phacoemulsification and sodium hyaluronate was used in all cases. The mean follow-up time was greater than seven months. The average cell loss was 9.6% and 10.9%, respectively. There was no significant difference in cell loss or visual results in the two groups. The amount of cell loss compares favorably with other series in which cell loss was determined following cataract surgery with and without IOL implantation. 相似文献
7.
Larry R. Faulkner M.D. Joseph D. Bloom M.D. David L. Cutler M.D. James H. Shore M.D. J. Donald Bray M.D. Joseph Murray M.S. 《Community mental health journal》1987,23(4):260-270
The authors review the relationship that has evolved over the years between the Department of Psychiatry at Oregon Health Sciences University and Oregon's community and state mental health programs. They describe the compatibility that exists between the basic requirements of academic psychiatry departments and public mental health programs and demonstrate how these organizations have been able to fulfill one another's needs in Oregon. Specific examples of successful collaborations in the areas of education, administration, research, and service are presented to illustrate how relationships that have been designed to meet specific requirements of one organization can fulfill many requirements of both. Suggestions are provided for those organizations contemplating similar collaborative endeavors. 相似文献
8.
9.
Hausegger KA; Cragg AH; Lammer J; Lafer M; Fluckiger F; Klein GE; Sternthal MH; Pilger E 《Radiology》1994,190(1):199
10.