全文获取类型
收费全文 | 20346篇 |
免费 | 544篇 |
国内免费 | 15篇 |
专业分类
管理学 | 2696篇 |
民族学 | 107篇 |
人才学 | 1篇 |
人口学 | 1847篇 |
丛书文集 | 169篇 |
理论方法论 | 1769篇 |
综合类 | 782篇 |
社会学 | 9989篇 |
统计学 | 3545篇 |
出版年
2023年 | 103篇 |
2021年 | 144篇 |
2020年 | 316篇 |
2019年 | 397篇 |
2018年 | 531篇 |
2017年 | 730篇 |
2016年 | 500篇 |
2015年 | 380篇 |
2014年 | 483篇 |
2013年 | 3282篇 |
2012年 | 706篇 |
2011年 | 692篇 |
2010年 | 557篇 |
2009年 | 488篇 |
2008年 | 528篇 |
2007年 | 579篇 |
2006年 | 562篇 |
2005年 | 505篇 |
2004年 | 419篇 |
2003年 | 384篇 |
2002年 | 404篇 |
2001年 | 520篇 |
2000年 | 455篇 |
1999年 | 425篇 |
1998年 | 314篇 |
1997年 | 288篇 |
1996年 | 275篇 |
1995年 | 271篇 |
1994年 | 260篇 |
1993年 | 249篇 |
1992年 | 313篇 |
1991年 | 291篇 |
1990年 | 288篇 |
1989年 | 260篇 |
1988年 | 250篇 |
1987年 | 271篇 |
1986年 | 229篇 |
1985年 | 255篇 |
1984年 | 276篇 |
1983年 | 263篇 |
1982年 | 237篇 |
1981年 | 208篇 |
1980年 | 190篇 |
1979年 | 211篇 |
1978年 | 179篇 |
1977年 | 153篇 |
1976年 | 152篇 |
1975年 | 173篇 |
1974年 | 137篇 |
1973年 | 110篇 |
排序方式: 共有10000条查询结果,搜索用时 578 毫秒
851.
Approaches used by employee assistance programs to address perpetration of intimate partner violence
Walters JL Pollack KM Clinton-Sherrod M Lindquist CH McKay T Lasater BM 《Violence and victims》2012,27(2):135-147
Employee Assistance Programs (EAPs) are workplace resources available to employees with problems impacting work performance. EAPs are well-positioned to address intimate partner violence (IPV), a major public health problem with workplace impacts. A purposeful sample of 28 EAPs across the United States was surveyed to identify policies and programs to address IPV, including perpetration. Most EAPs did not report having standardized approaches for addressing IPV perpetration. EAPs also described significant barriers to identifying IPV perpetrators, with the majority relying on self-disclosure on the part of the perpetrator when contacting the EAP. These results suggest that many EAPs--even when interacting with employees who present with issues known to correlate with IPV--are missing a potential opportunity to assess and intervene with IPV perpetrators. 相似文献
852.
This paper examines rural population ageing in the United States with a particular focus on the contrasting contexts in which older rural residents live. We compare the characteristics of the older population by rural versus urban residence, and explore challenges and opportunities associated with the ageing of rural baby boomers. The United States is a vast territory, and rural areas in the US are diverse regionally, in poverty and income, principal forms of employment, proximity to metropolitan areas, population size, density and composition, the history of change in these parameters, and a number of other factors that affect the ageing process. Hence, the diversity across rural areas is an important consideration in what affects the well being of rural elderly individuals, as well as the community-level impacts of rural ageing. Further, the characteristics of the older rural population help shape community and rural development outcomes for diverse rural communities. We use data from various US Census Bureau sources, and cite other studies to provide a demographic overview of ageing in the rural United States, and to analyze how this situation differs in varying socio-demographic and regional contexts. In the concluding section, we focus on policy implications associated with rural ageing. 相似文献
853.
Rural custodial grandparents have been understudied. As the grandparent caregiving population increases, more attention is needed to understand custodial grandparents in rural settings. This article explores the state of knowledge of the experiences of rural grandparents. A systematic review of the caregiving literature is conducted to understand the issues affecting this caregiving population. The results suggest that rural grandparents often are minority grandmothers with limited resources who provide care to older grandchildren in isolated environments. Attention is given to the social ecological framework as one model that can help to inform how social workers intervene with this population. Recommendations are offered for social work research, practice, and policy. 相似文献
854.
Pollen specialization by solitary bees in an urban landscape 总被引:1,自引:1,他引:0
Many polylectic bee species are known to specialize locally on one or a few pollen types to increase foraging efficiency. What is relatively unknown is how different landscapes influence foraging decisions, and whether habitat alteration, such as that resulting from urbanization, influences broad-scale foraging activities of bees. This study evaluates the type and diversity of pollen collected by two solitary bees that are common in Toronto, Ontario, Canada, the native Osmia pumila and the exotic O. caerulescens, sampled in trap nests set up in urban parks and gardens. We found that the dominant pollen in every successful brood cell was either of one widespread, cosmopolitan lawn-invasive plant species (Trifolium repens) or one of two wind-pollinated tree genera (Quercus spp. and Betula spp.). In combination, these three represented more than 90 % of all pollen collected by each bee species. Despite considerable overlap in the dominant pollen types collected by each bee species, the exotic O. caerulescens was significantly more specialized than the native O. pumila. Brood cells with Betula as the dominant pollen type were more pollen species-rich than those cells having Trifolium or Quercus as dominant, perhaps a result of the comparatively low protein content in Betula pollen. 相似文献
855.
Eyamba G. Bokamba 《Journal of Sociolinguistics》2014,18(3):408-414
856.
857.
In this article, we investigated the effects of marriage and spousal characteristics on the use of preventive care. We accounted for the endogeneity of marriage by combining propensity score estimation techniques with marriage transitions observed in longitudinal data. Results indicated that marriage increases the probability of dental check-ups and physical examinations for both sexes and mammograms and Pap smears for women. Next, we examined whether spousal characteristics affect the use of preventive care. Spousal education, income, health conditions, and preferences for risk and health care all affected use of preventive care in expected directions. Taken together, we conclude that marriage increases the use of preventive care; however, the net marital effect masks a heterogeneity that results from the characteristics of the spouse an individual marries. 相似文献
858.
Jeri L. Damman 《European Journal of Social Work》2014,17(1):32-44
This paper undertakes an international comparison of parent engagement in the USA and England. Research from both countries is reviewed to establish the extent to which parent engagement is achieving the benefit of an improved fit between need and services and what, if any, differences exist between the experiences of parents in the USA and England. Despite some unique differences, research from both countries identifies similar experiences among parents. Those studies indicate that parent engagement is not yet contributing to the provision of services that are more timely, appropriate, or adequate in meeting parent need. The barriers to achieving a better fit between needs and services are explored and system-wide issues that limit the effectiveness of engagement with parents are discussed. The paper presents the Munro Review of Child Protection in England as a catalyst for change in improving the child welfare system's approach to parent engagement and establishing a better fit between needs and services. Consideration of the applicability of the Munro Review findings to the USA child welfare system or replication of such a review is proposed. 相似文献
859.
This study was designed to explore the grandparent-grandchild relationship from the perspective of South African adolescents, and to investigate whether grandparental involvement is independently associated with adolescents’ psychological well-being. Data were collected from 204 adolescents (mean age = 13.69) using a school-based survey. Results revealed high levels of contact between grandparents and grandchildren, although involvement varied depending on grandparent, grandchild, and family characteristics. Grandparental involvement was significantly associated with more adolescent prosocial behavior, independent of parental involvement. The findings suggest a unique association between grandparental involvement and prosocial behavior that is robust across different cultural contexts. 相似文献
860.