全文获取类型
收费全文 | 3611篇 |
免费 | 415篇 |
国内免费 | 5篇 |
专业分类
耳鼻咽喉 | 6篇 |
儿科学 | 144篇 |
妇产科学 | 56篇 |
基础医学 | 264篇 |
口腔科学 | 84篇 |
临床医学 | 213篇 |
内科学 | 530篇 |
皮肤病学 | 25篇 |
神经病学 | 114篇 |
特种医学 | 173篇 |
外科学 | 189篇 |
综合类 | 18篇 |
预防医学 | 1982篇 |
眼科学 | 8篇 |
药学 | 70篇 |
中国医学 | 1篇 |
肿瘤学 | 154篇 |
出版年
2023年 | 35篇 |
2022年 | 57篇 |
2021年 | 53篇 |
2020年 | 102篇 |
2019年 | 40篇 |
2018年 | 111篇 |
2017年 | 117篇 |
2016年 | 115篇 |
2015年 | 122篇 |
2014年 | 120篇 |
2013年 | 205篇 |
2012年 | 87篇 |
2011年 | 84篇 |
2010年 | 151篇 |
2009年 | 157篇 |
2008年 | 102篇 |
2007年 | 99篇 |
2006年 | 109篇 |
2005年 | 83篇 |
2004年 | 71篇 |
2003年 | 48篇 |
2002年 | 106篇 |
2001年 | 122篇 |
2000年 | 86篇 |
1999年 | 161篇 |
1998年 | 167篇 |
1997年 | 206篇 |
1996年 | 223篇 |
1995年 | 133篇 |
1994年 | 59篇 |
1993年 | 127篇 |
1992年 | 40篇 |
1991年 | 25篇 |
1990年 | 39篇 |
1989年 | 47篇 |
1988年 | 47篇 |
1987年 | 40篇 |
1986年 | 39篇 |
1985年 | 29篇 |
1984年 | 19篇 |
1983年 | 25篇 |
1982年 | 20篇 |
1981年 | 21篇 |
1980年 | 15篇 |
1979年 | 12篇 |
1978年 | 13篇 |
1977年 | 11篇 |
1976年 | 19篇 |
1975年 | 9篇 |
1974年 | 8篇 |
排序方式: 共有4031条查询结果,搜索用时 15 毫秒
31.
32.
33.
SUSAN MATTSON RNC CTN Ph D LILLIAN LEW RD MEd 《Journal of obstetric, gynecologic, and neonatal nursing : JOGNN / NAACOG》1992,21(1):48-54
OBJECTIVE: To evaluate the success of the Southeast Asian Health Project in terms of client satisfaction with the prenatal care and other services. To obtain additional data about Southeast Asian women's health practices regarding childbearing. DESIGN: Survey through questionnaires administered as interviews. SETTING: In clients' homes or via telephone. PARTICIPANTS: 119 women from SEAHP's case files of recently delivered clients. MEASUREMENTS AND MAIN RESULTS: Interviews were conducted by four community workers fluent in Cambodian or Lao. The majority of women were satisfied with SEAHP, particularly the interpretation and education in native languages. Women were also satisfied with SEAHP, encouraging others to seek care. CONCLUSIONS: SEAHP appears to meet prenatal care needs of Southeast Asian women in Long Beach, California. More objective outcome data await analyses, but the program's approach may ensure access to and use of health services. 相似文献
34.
A 54-year old man presented with multiple pulmonary emboli and an incidental finding of a huge left ventricular thrombus. Transthoracic echo images demonstrated a globally dilated heart with very poor left ventricular function. It was elected to manage the patient medically, and he was commenced on warfarin therapy, resulting in completed resolution of the thrombus over 10 weeks. No underlying cause was found and he did not experience any further embolic events. This illustrates a rare case of a large ventricular thrombus in a patient with no underlying risk factors. 相似文献
35.
36.
Discrepancies Between Perceived Dietary Changes and 4-Day Food Records in Older Adults with Diabetes
37.
38.
39.
CAROL J. LAMMI-KEEFE PhD RD ELAINE S. LICKTEIG MS RD NAMANJEET AHLUWALIA PhD N.REBECCA HALEY MD 《Journal of the American Dietetic Association》1996,96(3):247-251
Objective To determine the day-to-day variation in biochemical measures of iron status in a group of elderly women with rheumatoid arthritis compared with a group of healthy elderly women.Design Venous blood samples were collected from each subject on 3 nonconsecutive days during a 2-week study period; subjects had fasted overnight. Variability in hemoglobin level, hematocrit value, serum iron concentration, total iron-binding capacity, transferrin saturation, serum ferritin concentration, and plasma transferrin receptor level was determined.Subjects Two groups of women, one with rheumatoid arthritis (n=10) and another that was apparently healthy (n=10).Statistical analyses Variance component analysis was used to estimate the biological variation (σ2day) and analytic variation (σ2rep) for each iron index. The coefficient of variation (CV) for each variance component was calculated: coefficient of biological variation = CVday, coefficient of analytic variation = CVrep, and coefficient of a single future determination = CVfd.Results The CVrep for all iron indexes was smaller than the CVday in both groups. The CVday was considerably higher for serum iron concentration and for transferrin saturation than for the other indexes in both groups (16.6% arid 16.6% in healthy subjects and 33.6% and 28.2%, respectively, in subjects with rheumatoid arthritis). The higher CVday for serum iron concentration and transferrin saturation translated into a higher CVfd for these indexes. Because of the higher variance for these two indexes, more sampling days were required for reliable estimates. CVda and CVfd for plasma transferrin receptor level were relatively low.Conclusions These findings corroborate our previous finding that variation of serum ferritin concentration in the elderly is lower than that demonstrated in younger populations. This aging effect persists in the presence of rheumatoid arthritis. Fasting appeared to improve reliability in the determinations for serum iron concentration and transferrin saturation. Variability estimates for the indexes other than serum iron concentration and transferrin saturation were not altered by the inflammation of rheumatoid arthritis. Plasma transferrin receptor level is a reliable index for assessing iron status in populations with rheumatoid arthritis. J Am Diet Assoc. 1996; 96:247-251. 相似文献
40.