全文获取类型
收费全文 | 65146篇 |
免费 | 6833篇 |
国内免费 | 1371篇 |
专业分类
耳鼻咽喉 | 1260篇 |
儿科学 | 2402篇 |
妇产科学 | 1094篇 |
基础医学 | 3075篇 |
口腔科学 | 1249篇 |
临床医学 | 11564篇 |
内科学 | 7191篇 |
皮肤病学 | 687篇 |
神经病学 | 4227篇 |
特种医学 | 1338篇 |
外国民族医学 | 1篇 |
外科学 | 6184篇 |
综合类 | 7163篇 |
一般理论 | 6篇 |
预防医学 | 11621篇 |
眼科学 | 520篇 |
药学 | 7285篇 |
86篇 | |
中国医学 | 2734篇 |
肿瘤学 | 3663篇 |
出版年
2024年 | 149篇 |
2023年 | 1609篇 |
2022年 | 3002篇 |
2021年 | 3893篇 |
2020年 | 4582篇 |
2019年 | 3861篇 |
2018年 | 3487篇 |
2017年 | 3125篇 |
2016年 | 3086篇 |
2015年 | 3003篇 |
2014年 | 6186篇 |
2013年 | 5910篇 |
2012年 | 4246篇 |
2011年 | 4288篇 |
2010年 | 3015篇 |
2009年 | 2949篇 |
2008年 | 2781篇 |
2007年 | 2620篇 |
2006年 | 2063篇 |
2005年 | 1746篇 |
2004年 | 1352篇 |
2003年 | 1048篇 |
2002年 | 805篇 |
2001年 | 739篇 |
2000年 | 671篇 |
1999年 | 512篇 |
1998年 | 393篇 |
1997年 | 358篇 |
1996年 | 322篇 |
1995年 | 268篇 |
1994年 | 242篇 |
1993年 | 190篇 |
1992年 | 159篇 |
1991年 | 127篇 |
1990年 | 93篇 |
1989年 | 71篇 |
1988年 | 61篇 |
1987年 | 68篇 |
1986年 | 44篇 |
1985年 | 56篇 |
1984年 | 43篇 |
1983年 | 22篇 |
1982年 | 26篇 |
1981年 | 25篇 |
1980年 | 15篇 |
1979年 | 12篇 |
1978年 | 4篇 |
1976年 | 3篇 |
1975年 | 8篇 |
1974年 | 4篇 |
排序方式: 共有10000条查询结果,搜索用时 17 毫秒
61.
Human leukocyte antigens (HLA) alleles may affect the development of cervical cancer through immunologic control of human papillomavirus (HPV). The association between HLA-DQB1 alleles and risk of cervical cancer has been extensively studied, but the results obtained remain inconsistent. To explore a more extensive role of HLA-DQB1 alleles on cervical cancer risk, we carried out a meta-analysis including 4862 cases and 8988 controls from 22 published studies. Odds ratios (ORs) and 95% confidence intervals (CIs) were used to assess the strength of the association. The overall results suggested that HLA-DQB1*02 (OR = 0.91, 95% CI = 0.82–0.99), *03 (OR = 0.85, 95% CI = 0.74–0.97) and *0603 (OR = 0.62, 95% CI = 0.53–0.72) had a significantly association with decreased cervical cancer risk. In contrast, DQB1*05 (OR = 1.18, 95% CI = 1.01–1.38), *0301 (OR = 1.14, 95% CI = 1.06–1.23) and *0402 (OR = 1.31, 95% CI = 1.04–1.64) conferred a significantly higher risk to cervical cancer. Moreover, a significantly association with increased or decreased cervical cancer risk was found among Europeans and Asians after stratification of the HLA-DQB1 alleles by ethnicity. These findings supported that the HLA-DQB1 alleles may contribute to genetic susceptibility of cervical cancer. Further studies with a greater number of cases are expected to confirm our results. 相似文献
62.
《Gaceta sanitaria / S.E.S.P.A.S》2022,36(4):376-379
ObjectiveTo estimate the prospective relationships between exposure to psychosocial risks dimensions included in the COPSOQ-Istas21 and the deterioration of general and mental health and sleep problems among workers residing in Spain.MethodCohort whose baseline corresponds to the 2016 Psychosocial Risks Survey with a new measurement after one year.ResultsSocial capital and interpersonal relations and leadership dimensions, as well as work?life conflict, were related to all health variables. Dimensions of work organization and job contents did it especially with the mental health, the quantitative demands with the general health and the emotional ones with the mental health. The dimensions related to job insecurity did not show relationships with health.ConclusionsThe results obtained reinforce the role of the COPSOQ-Istas21 as a useful instrument for the evaluation and prevention of psychosocial risks at work. 相似文献
63.
Factors predicting the development of pressure ulcers in an at‐risk population who receive standardized preventive care: secondary analyses of a multicentre randomised controlled trial 下载免费PDF全文
64.
目的:探讨责任制整体护理在结直肠外科病房的实施的可能性及实施效果。方法:总结责任制整体护理在某三级甲等医院结直肠外科病房的试验实施方案,调查执行该护理模式前后出院患者的满意程度和临床护理质量,并进行统计学分析。结果:试验执行责任制整体护理后,患者对临床护理的满意程度大幅提高,科室的临床护理质量也有显著提升,但是在护理文件整理方面仍有待调整。结论:责任制整体护理模式在结直肠外科病房可以实现,且能提高患者的满意程度和护理质量,深入实施后,能为患者提供更优质的临床护理服务。 相似文献
65.
目的对中国精神分裂症患者采取家庭干预的研究文献进行综合回顾和系统评价, 比较不同条件下家庭干预效果的差异。方法在中国知网、维普、万方、中国生物医学文献数据库四大中文数据库及OVID Medline、Science Direct、Web of Science、EBSCO四大英文数据库中, 检索各数据库建库至2015年1月为止使用社会功能缺陷筛选量表(SDSS)、简明精神病(科)量表(BPRS)、阳性与阴性症状量表(PANSS)研究中国精神分裂症患者家庭干预效果的文献, 以标准化加权均数差( SMD)作为效应量, 采用meta分析比较不同干预时间、不同干预类型、对不同病程和不同严重程度的精神分裂症患者的家庭干预效果差异。 结果共纳入57篇符合标准的文献。SDSS、PANSS分析结果显示:① 干预时间越长干预效果越好( P < 0.0001、 P=0.0025);② 单独家庭干预比多个家庭合并单独家庭干预的效果更明显( P < 0.0001、 P=0.0131);③ 干预对于病情较重患者效果较好( P < 0.0001、 P=0.0280)。SDSS量表还显示家庭干预对于病程短的患者效果更好( P < 0.0001)。 结论家庭干预更适合病程较短的精神分裂症患者, 干预应实施较长时间; 单独家庭干预更有利于患者阴性症状的改善和社会功能的康复, 且对于病情较轻患者的阴性症状改善效果更好。 相似文献
66.
67.
68.
《European journal of surgical oncology》2019,45(10):1812-1816
ObjectivesMeshes/matrices are commonly used in immediate breast reconstruction. There are few studies comparing biological and synthetic meshes and it is unknown what type of mesh gives the best long-term results. The aim of this study was to compare long-term health-related quality of life (HrQoL) and patient satisfaction in implant-based immediate breast reconstruction with a biological mesh (Surgisis®) with that of patients reconstructed with a synthetic mesh (TIGR ® Matrix Surgical Mesh).Material and methodsBoth cohorts were prospectively included and consecutively operated. Clinical data was collected. HrQoL was evaluated with EuroQoL-5 dimension – 3 levels questionnaire (EQ-5D-3L) and the Hospital Anxiety and Depression Scale (HADS) and the Breast-Q.Results and conclusionSeventy-one patients were operated on in the biological group and 49 in the synthetic group. The response rates were 75 and 84 per cent, respectively. Mean follow-up time was 74 months and 23 months, respectively. There were no statistical differences in satisfaction and quality of life between the two groups. Complications and radiation seem to lead to a lower satisfaction. Our findings could indicate that biological and synthetic meshes give an equal long-term result as regards patients’ perceived quality of life. 相似文献
69.
70.
目的 研究缺血性脑血管病患者脑微出血(CMB)危险因素及其对抗血小板单药治疗的影响。方法 选取2018年1月至2018年6月该院神经内科接受抗血小板单药治疗的急性缺血性脑血管病患者300例为样本,入院后采集基本资料并完善相关检查,根据梯度回波T2*加权成像(GRE-T2*WI)检查结果将患者分为CMB组(176例)和非CMB组(124例),均给予抗血小板聚集治疗,比较两组临床资料及治疗1年内再发梗死、脑出血和病死率,分析影响CMB发病的危险因素以及CMB对抗血小板单药治疗的影响。结果 高龄、高血压、肥胖、脑卒中病史、ACI和脑白质疏松为CMB发生的危险因素(P<0.05)。CMB组和非CMB组抗血小板单药治疗期间脑出血率分别为14.20%和6.45%,差异有统计学意义(P<0.05)。轻度组、中度组和重度组脑出血率分别为9.18%、10.64%和35.48%,差异有统计学意义(P<0.05)。不同部位CMB患者抗血小板单药治疗期间再发脑梗死、脑出血及病死率比较,差异无统计学意义(P>0.05)。结论 高龄、高血压、肥胖、脑卒中病史、ACI及脑白质疏松为缺血性脑血管疾病合并CMB的危险因素。CMB可导致抗血小板单药治疗期间脑出血风险增加,重度CMB者更甚。 相似文献