全文获取类型
收费全文 | 1458574篇 |
免费 | 102790篇 |
国内免费 | 5807篇 |
专业分类
耳鼻咽喉 | 21360篇 |
儿科学 | 43186篇 |
妇产科学 | 42625篇 |
基础医学 | 204418篇 |
口腔科学 | 43175篇 |
临床医学 | 123433篇 |
内科学 | 282926篇 |
皮肤病学 | 32433篇 |
神经病学 | 114063篇 |
特种医学 | 57814篇 |
外国民族医学 | 449篇 |
外科学 | 224900篇 |
综合类 | 40114篇 |
现状与发展 | 12篇 |
一般理论 | 472篇 |
预防医学 | 101737篇 |
眼科学 | 34243篇 |
药学 | 111286篇 |
37篇 | |
中国医学 | 5559篇 |
肿瘤学 | 82929篇 |
出版年
2018年 | 13946篇 |
2016年 | 12409篇 |
2015年 | 14412篇 |
2014年 | 19817篇 |
2013年 | 28965篇 |
2012年 | 38180篇 |
2011年 | 40322篇 |
2010年 | 24272篇 |
2009年 | 23211篇 |
2008年 | 37829篇 |
2007年 | 40990篇 |
2006年 | 41370篇 |
2005年 | 39690篇 |
2004年 | 38278篇 |
2003年 | 37071篇 |
2002年 | 36413篇 |
2001年 | 69103篇 |
2000年 | 70938篇 |
1999年 | 59938篇 |
1998年 | 16257篇 |
1997年 | 14698篇 |
1996年 | 13786篇 |
1995年 | 13002篇 |
1994年 | 12173篇 |
1992年 | 45765篇 |
1991年 | 44355篇 |
1990年 | 43528篇 |
1989年 | 42458篇 |
1988年 | 39739篇 |
1987年 | 39036篇 |
1986年 | 37408篇 |
1985年 | 35547篇 |
1984年 | 26505篇 |
1983年 | 22538篇 |
1982年 | 13467篇 |
1981年 | 12249篇 |
1979年 | 25558篇 |
1978年 | 18082篇 |
1977年 | 15697篇 |
1976年 | 14191篇 |
1975年 | 16324篇 |
1974年 | 19267篇 |
1973年 | 18834篇 |
1972年 | 18012篇 |
1971年 | 16844篇 |
1970年 | 15941篇 |
1969年 | 15336篇 |
1968年 | 14388篇 |
1967年 | 12834篇 |
1966年 | 11994篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
51.
M. Simons R. Kimble S. McPhail Z. Tyack 《Burns : journal of the International Society for Burn Injuries》2019,45(8):1792-1809
BackgroundThe measurement of health-related quality of life (HRQoL) provides information about the perceived burden of the health condition and treatments from a lived experience. The Brisbane Burn Scar Impact Profile (caregiver report for young children, BBSIP0–8), developed in 2013, is a proxy-report measure of burn scar-specific HRQoL. The aim of this study was to report its psychometric properties in line with an evaluative purpose.MethodsCaregivers of children up to 8 years of age at risk of burn scarring were recruited into a prospective, longitudinal cohort study. Caregivers completed the BBSIP0–8, Pediatric Quality of Life Inventory and Patient Observer Scar Assessment Scale at baseline (approximately ≥85% of the total body surface area re-epithelialised), 1–2 weeks after baseline and 1-month after baseline. Psychometric properties measured included internal consistency, test–retest reliability, validity and responsiveness.ResultsEighty-six caregivers of mostly male children (55%), of a median age (IQR) of 1 year, 10 months (2 years, 1 month) and total body surface area burn of 1.5% (3.0%) were recruited. Over one third of participants were grafted and 15% had contractures or skin tightness at baseline. Internal consistency of ten item groups ranged from 0.73 to 0.96. Hypothesised correlations of changes in the BBSIP0–8 items with changes in criterion measures supported longitudinal validity (ρ ranging from ?0.73 to 0.68). The majority of item groups had acceptable reproducibility (ICC = 0.65–0.83). The responsiveness of five item groups was supported (AUC = 0.71–0.90).ConclusionThe psychometric properties tested support the use of the BBSIP0–8 as an evaluative measure of burn scar-related health-related quality of life for children aged below eight years in the early post-acute period of rehabilitation. Further investigation at longer time period after burn injury is indicated. 相似文献
52.
Shengxuan Cao Chen Wang Xin Ma Xu Wang Jiazhang Huang Chao Zhang Li Chen Xiang Geng Kan Wang 《Journal of orthopaedic research》2019,37(8):1860-1867
Patients with mechanic ankle instability experience increased tibiotalar and subtalar joint laxity. However, in vivo joint kinematics in functional ankle instability (FAI) patients and lateral ankle sprain (LAS) copers, especially during dynamic activities, are poorly understood. Ten FAI patients, 10 LAS copers, and 10 healthy controls were included in this study. A dual fluoroscopic imaging system was used to analyze the tibiotalar and subtalar joint kinematics during stair descent. Five key poses of stair descent were analyzed. Kinematic data from six degrees of freedom were calculated utilizing a solid modeling software. The range of motion and joint positions in each degree of freedom were compared among the three groups. The tibiotalar joints of FAI patients and LAS copers were significantly more inverted than those of healthy controls during the foot strike (p = 0.016, = 0.264). The subtalar joints of FAI patients were significantly more anteriorly translated (pose 2, p = 0.003, = 0.352; pose 3, p < 0.001, = 0.454; pose 4, p = 0.004, = 0.334), inverted (pose 4, p = 0.027, = 0.234; pose 5,p = 0.034, = 0.221), and externally rotated (pose 4, p = 0.037, = 0.217; pose 5; p = 0.004, = 0.331) than those of healthy controls during the mid‐stance and the heel off. The FAI patients showed excessive tibiotalar inversion and subtalar joint hypermobility during stair descent. Meanwhile, the LAS copers maintained subtalar joint stability, and only showed excessive tibiotalar inversion in foot strike. These data provide insight into the mechanisms behind the development of FAI after initial LAS. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 37:1860–1867, 2019 相似文献
53.
54.
Michael L. Goodman Miriam S. Mutambudzi Stanley Gitari Philip H. Keiser Sarah E. Seidel 《Vulnerable children and youth studies》2016,11(4):366-378
There are an estimated 56 million orphans and vulnerable children across sub-Saharan Africa. Communities typically care for orphan children through informal caring arrangements – either within or outside of kinship networks. Within Kenya, an estimated 250,000 children live on the streets. There is less research related to fostering attitudes of this special population than orphans and vulnerable children generally. Important research over the past decade has illuminated multiple ways in which children are made more vulnerable because of HIV, including parental death and street-migration from HIV-affected households. As HIV transitions from a terminal illness to a chronic, manageable one, research is also required to establish how parents living with HIV can be an asset to children. In this study, we assess whether mothers living with HIV were very willing to foster biologically-related children, and street-involved children, how these fostering attitudes differed from mothers not living with HIV, and whether differences in fostering attitudes by reported HIV status were mediated by social support, family functioning and general self-rated health. Approximately 40% of mothers living with HIV were very willing to provide long-term foster care to biologically-related or street-involved children. This was less than the percentage of mothers not living with HIV, who were very willing to foster biologically-related children (61%) or street-involved children (58%). Significant portions of these differences were explained by social support, family functioning and general self-rated health. Multi-sectoral approaches are suggested by these findings in order to improve the child-fostering capacity of mothers living with HIV. Improving social support, family functioning and general self-rated health among HIV-infected mothers may not only provide protective benefits for the mothers and their children, but also expand the community’s capacity to care for orphan and vulnerable children. 相似文献
55.
56.
57.
58.
59.
60.