全文获取类型
收费全文 | 161168篇 |
免费 | 33323篇 |
国内免费 | 2516篇 |
学科分类
医药卫生 | 197007篇 |
出版年
2024年 | 512篇 |
2023年 | 4823篇 |
2022年 | 1215篇 |
2021年 | 3333篇 |
2020年 | 6162篇 |
2019年 | 2454篇 |
2018年 | 7702篇 |
2017年 | 7578篇 |
2016年 | 8667篇 |
2015年 | 8759篇 |
2014年 | 15894篇 |
2013年 | 16164篇 |
2012年 | 6261篇 |
2011年 | 6362篇 |
2010年 | 10895篇 |
2009年 | 14726篇 |
2008年 | 6447篇 |
2007年 | 4657篇 |
2006年 | 7198篇 |
2005年 | 4338篇 |
2004年 | 3555篇 |
2003年 | 2444篇 |
2002年 | 2469篇 |
2001年 | 4190篇 |
2000年 | 3347篇 |
1999年 | 3494篇 |
1998年 | 3745篇 |
1997年 | 3560篇 |
1996年 | 3449篇 |
1995年 | 3266篇 |
1994年 | 1993篇 |
1993年 | 1622篇 |
1992年 | 1549篇 |
1991年 | 1589篇 |
1990年 | 1203篇 |
1989年 | 1305篇 |
1988年 | 1118篇 |
1987年 | 956篇 |
1986年 | 975篇 |
1985年 | 786篇 |
1984年 | 606篇 |
1983年 | 584篇 |
1982年 | 552篇 |
1981年 | 444篇 |
1980年 | 386篇 |
1979年 | 353篇 |
1978年 | 380篇 |
1977年 | 430篇 |
1975年 | 309篇 |
1972年 | 312篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
61.
Elizabeth A. Mosley PhD MPH Amy J. Schulz PhD MPH MSW Lisa H. Harris MD PhD Barbara A. Anderson PhD 《Women & health》2020,60(7):806-820
ABSTRACT Abortion is legal in South Africa, but negative abortion attitudes remain common and are poorly understood. We used nationally representative South African Social Attitudes Survey data to analyze abortion attitudes in the case of fetal anomaly and in the case of poverty from 2007 to 2016 (n = 20,711; ages = 16+). We measured correlations between abortion attitudes and these important predictors: religiosity, attitudes about premarital sex, attitudes about preferential hiring and promotion of women, and attitudes toward family gender roles. Abortion acceptability for poverty increased over time (b = 0.05, p < .001), but not for fetal anomaly (b = ?0.008, p = .284). Highly religious South Africans reported lower abortion acceptability in both cases (Odds Ratio (OR)anomaly = 0.85, p = .015; ORpoverty = 0.84, p = .02). Premarital sex acceptability strongly and positively predicted abortion acceptability (ORanomaly = 2.63, p < .001; ORpoverty = 2.46, p < .001). Attitudes about preferential hiring and promotion of women were not associated with abortion attitudes, but favorable attitudes about working mothers were positively associated with abortion acceptability for fetal anomaly ((ORanomaly = 1.09, p = .01; ORpoverty = 1.02, p = .641)). Results suggest negative abortion attitudes remain common in South Africa and are closely tied to religiosity, traditional ideologies about sexuality, and gender role expectations about motherhood. 相似文献
62.
63.
64.
65.
Worsening pneumonitis due to a pharmacokinetic drug–drug interaction between everolimus and voriconazole in a renal transplant patient 下载免费PDF全文
66.
67.
68.
69.
Fur-Hsing Wen Jen-Shi Chen Wen-Chi Chou Wen-Cheng Chang Wen Chi Shen Chia-Hsun Hsieh Siew Tzuh Tang 《Journal of pain and symptom management》2019,57(1):64-72
Context
Family caregivers constitute a critical component of the end-of-life care system with considerable cost to themselves. However, the joint association of terminally ill cancer patients' symptom distress and functional impairment with caregivers' subjective caregiving burden, quality of life (QOL), and depressive symptoms remains unknown.Objectives/Methods
We used multivariate hierarchical linear modeling to simultaneously evaluate associations between five distinct patterns of conjoint symptom distress and functional impairment (symptom-functional states) and subjective caregiving burden, QOL, and depressive symptoms in a convenience sample of 215 family caregiver–patient dyads. Data were collected every 2 to 4 weeks over patients' last 6 months.Results
Caregivers of patients in the worst symptom-functional states (States 3–5) reported worse subjective caregiving burden and depressive symptoms than those in the best two states, but the three outcomes did not differ between caregivers of patients in State 3 and States 4–5. Caregivers of patients in State 5 endured worse subjective caregiving burden and QOL than those in State 4. Caregivers of patients in State 4 suffered worse subjective caregiving burden and depressive symptoms but comparable QOL to those in State 2.Conclusion
Patients' five distinct, conjoint symptom-functional states were significantly and differentially associated with their caregivers' worse subjective caregiving burden, QOL, and depressive symptoms while caring for patients over their last 6 months. 相似文献70.