全文获取类型
收费全文 | 28046篇 |
免费 | 2668篇 |
国内免费 | 499篇 |
专业分类
耳鼻咽喉 | 177篇 |
儿科学 | 842篇 |
妇产科学 | 913篇 |
基础医学 | 2689篇 |
口腔科学 | 242篇 |
临床医学 | 5796篇 |
内科学 | 3047篇 |
皮肤病学 | 218篇 |
神经病学 | 1660篇 |
特种医学 | 520篇 |
外科学 | 5177篇 |
综合类 | 3390篇 |
现状与发展 | 1篇 |
一般理论 | 5篇 |
预防医学 | 3731篇 |
眼科学 | 95篇 |
药学 | 1396篇 |
18篇 | |
中国医学 | 448篇 |
肿瘤学 | 848篇 |
出版年
2024年 | 53篇 |
2023年 | 591篇 |
2022年 | 763篇 |
2021年 | 1387篇 |
2020年 | 1362篇 |
2019年 | 1343篇 |
2018年 | 1243篇 |
2017年 | 1315篇 |
2016年 | 1180篇 |
2015年 | 1143篇 |
2014年 | 1875篇 |
2013年 | 2402篇 |
2012年 | 1627篇 |
2011年 | 1650篇 |
2010年 | 1449篇 |
2009年 | 1341篇 |
2008年 | 1385篇 |
2007年 | 1375篇 |
2006年 | 1164篇 |
2005年 | 932篇 |
2004年 | 809篇 |
2003年 | 664篇 |
2002年 | 539篇 |
2001年 | 464篇 |
2000年 | 410篇 |
1999年 | 377篇 |
1998年 | 295篇 |
1997年 | 284篇 |
1996年 | 245篇 |
1995年 | 220篇 |
1994年 | 187篇 |
1993年 | 143篇 |
1992年 | 121篇 |
1991年 | 114篇 |
1990年 | 88篇 |
1989年 | 81篇 |
1988年 | 72篇 |
1987年 | 70篇 |
1986年 | 55篇 |
1985年 | 81篇 |
1984年 | 60篇 |
1983年 | 40篇 |
1982年 | 38篇 |
1981年 | 30篇 |
1980年 | 35篇 |
1979年 | 25篇 |
1978年 | 31篇 |
1977年 | 14篇 |
1976年 | 19篇 |
1973年 | 7篇 |
排序方式: 共有10000条查询结果,搜索用时 109 毫秒
1.
2.
This meta-analysis was designed to assess the effectiveness and safety of extracorporeal shock wave therapy (ESWT) for patients with low back pain (LBP). Pubmed, Embase, Cochrane's library, PEDro (Physiotherapy Evidence Database), China National Knowledge Infrastructure (CNKI), and Wanfang Data were searched until December 2019 to identify studies assessing the effectiveness and safety of EPSW for LBP. The prime outcome is pain intensity measured by Visual Analog Scale (VAS) or numeric rating scale (NRS). Other outcomes included functional status, quality of life, psychological outcomes measured by Oswestry Disability Index (ODI), as well as the adverse events. Mean differences (MD) were calculated for continuous outcomes, while odd ratios (OR) were calculated for binary outcomes. Revman 5.3 software was used for statistical analysis. Five randomized controlled trials (RCTs) were finally included in this meta-analysis. The pooled mean difference in post-treatment pain scores was −2.37 (P <0.0001), indicating that post-treatment pain scores was significantly higher by 2.37 in control group than in ESWT group. At a mean follow-up time of 4–6 weeks, the pooled mean difference in ODI scores was −14.10 (P <0.00001), indicating that the pooled mean difference of post-treatment ODI scores was 14.10 higher in control group than in ESWT group. The use of ESWT is effective in alleviating pain and improving the general functional state for patients with LBP. However, more evidence was needed to verify its safety. 相似文献
3.
《Health & place》2022
PurposeAccording to the social determinants of health framework, income inequality is a potential risk factor for adverse mental health. However, few studies have explored the mechanisms suspected to mediate this relationship. The current study addresses this gap through a mediation analysis to determine if social support and community engagement act as mediators linking neighbourhood income inequality to maternal anxiety and depressive symptoms within a cohort of new mothers living in the City of Calgary, Canada.MethodsData collected at three years postpartum from mothers belonging to the All Our Families (AOF) cohort were used in the current study. Maternal data were collected between 2012 and 2015 and linked to neighbourhood socioeconomic data from the 2006 Canadian Census. Income inequality was measured using Gini coefficients derived from 2006 after-tax census data. Generalized structural equation models were used to quantify the associations between income inequality and mental health symptoms, and to assess the potential direct and indirect mediating effects of maternal social support and community engagement.ResultsIncome inequality was not significantly associated with higher depressive symptoms (β = 0.32, 95%CI = −0.067, 0.70), anxiety symptoms (β = 0.11, 95%CI = −0.39, 0.60), or lower social support. Income inequality was not associated with community engagement. For the depression models, higher social support was significantly associated with lower depressive symptoms (β = −0.13, 95%CI = −0.15, −0.097), while community engagement was not significantly associated with depressive symptoms (β = 0.059, 95%CI = −0.15, 0.27). Similarly, for the anxiety models, lower anxiety symptoms were significantly associated with higher levels of social support (β = −0.17, 95%CI = −0.20, −0.13) but not with higher levels of community engagement (β = 0.14, 95%CI = −0.14, 0.41).ConclusionThe current study did not find clear evidence for social support or community engagement mediating the relationship between neighbourhood income inequality and maternal mental health. Future investigations should employ a broader longitudinal approach to capture changes in income inequality, potential mediators, and mental health symptomatology over time. 相似文献
4.
Hannah C. Nordhues Anjali Bhagra Natya N. Stroud Jennifer A. Vencill Carol L. Kuhle 《Mayo Clinic proceedings. Mayo Clinic》2021,96(7):1907-1920
The coronavirus disease 2019 (COVID-19) pandemic has rapidly created widespread impacts on global health and the economy. Data suggest that women are less susceptible to severe illness. However, sex-disaggregated data are incomplete, leaving room for misinterpretation, and focusing only on biologic sex underestimates the gendered impact of the pandemic on women. This narrative review summarizes what is known about gender disparities during the COVID-19 pandemic and the economic, domestic, and health burdens along with overlapping vulnerabilities related to the pandemic. In addition, this review outlines recommended strategies that advocacy groups, community leaders, and policymakers should implement to mitigate the widening gender disparities related to COVID-19. 相似文献
5.
6.
7.
8.
9.
目的探究肿瘤坏死因子-α(Tumornecrosis factor-α,TNF-α)-308基因对导管相关性脓毒症(Catheter related sepsis,CRS)患者病情的影响,旨在为临床治疗CRS提供科学依据。方法选取2017年7月-2018年10月于浙江大学医学院附属杭州市第一人民医院接受治疗的86例CRS患者为研究对象,按照是否并发多器官功能障碍综合征将患者分为试验组和对照组,对照组共48例,未并发多器官功能障碍综合征,试验组共38例,并发多器官功能障碍综合征,分析两组患者TNF-α-308基因多态性差异,使用多因素Logistic回归分析CRS患者并发多器官功能障碍综合征的危险因素。结果试验组GA基因型频率34.21%、AA基因型频率50.00%、高G等位基因频率18.42%均高于对照组,GG基因型频率52.63%、A等位基因频率28.95%均低于对照组,差异均具有统计学意义(P<0.05);多因素Logistic回归分析结果显示,低GG基因型频率、低G等位基因频率、高GA基因型频率、高AA基因型频率、高A等位基因频率是CRS患者并发多器官功能障碍综合征的危险因素(P<0.05)。结论TNF-α-308基因与CRS患者病情密切相关,GG基因型频率和G等位基因频率降低,GA基因型频率、AA基因型频率、A等位基因频率升高会加重患者的病情,增加多器官功能障碍综合征的发生风险,临床上应该加以重视。 相似文献
10.