全文获取类型
收费全文 | 64965篇 |
免费 | 3157篇 |
国内免费 | 937篇 |
专业分类
耳鼻咽喉 | 288篇 |
儿科学 | 1553篇 |
妇产科学 | 1112篇 |
基础医学 | 5214篇 |
口腔科学 | 2023篇 |
临床医学 | 5110篇 |
内科学 | 17022篇 |
皮肤病学 | 621篇 |
神经病学 | 3182篇 |
特种医学 | 1252篇 |
外国民族医学 | 3篇 |
外科学 | 9661篇 |
综合类 | 5205篇 |
一般理论 | 1篇 |
预防医学 | 5989篇 |
眼科学 | 607篇 |
药学 | 5847篇 |
30篇 | |
中国医学 | 2687篇 |
肿瘤学 | 1652篇 |
出版年
2024年 | 121篇 |
2023年 | 1068篇 |
2022年 | 2375篇 |
2021年 | 3271篇 |
2020年 | 2307篇 |
2019年 | 4093篇 |
2018年 | 3384篇 |
2017年 | 2518篇 |
2016年 | 1567篇 |
2015年 | 1564篇 |
2014年 | 3086篇 |
2013年 | 3047篇 |
2012年 | 2406篇 |
2011年 | 2791篇 |
2010年 | 2142篇 |
2009年 | 2005篇 |
2008年 | 1957篇 |
2007年 | 1850篇 |
2006年 | 1464篇 |
2005年 | 1226篇 |
2004年 | 1065篇 |
2003年 | 918篇 |
2002年 | 728篇 |
2001年 | 531篇 |
2000年 | 456篇 |
1999年 | 385篇 |
1998年 | 331篇 |
1997年 | 320篇 |
1996年 | 267篇 |
1995年 | 251篇 |
1994年 | 256篇 |
1993年 | 187篇 |
1992年 | 197篇 |
1991年 | 154篇 |
1990年 | 118篇 |
1989年 | 128篇 |
1987年 | 89篇 |
1985年 | 1484篇 |
1984年 | 2508篇 |
1983年 | 2330篇 |
1982年 | 1752篇 |
1981年 | 1821篇 |
1980年 | 1522篇 |
1979年 | 1335篇 |
1978年 | 1151篇 |
1977年 | 661篇 |
1976年 | 1109篇 |
1975年 | 972篇 |
1974年 | 812篇 |
1973年 | 780篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
《Vaccine》2022,40(52):7604-7612
Background and ObjectiveVaccine uptake during pregnancy remains low. Our objectives were to describe 1) development and adaptation of a clinician communication training intervention for maternal immunizations and 2) obstetrics and gynecology (ob-gyn) clinician and staff perspectives on the intervention and fit for the prenatal care context.MethodsDesign of the Motivational Interviewing for Maternal Immunizations (MI4MI) intervention was based on similar communication training interventions for pediatric settings and included presumptive initiation of vaccine recommendations (“You’re due for two vaccines today”) combined with motivational interviewing (MI) for hesitant patients. Interviews and focus group discussions were conducted with ob-gyn clinicians and staff in five Colorado clinics including settings with obstetric physicians, certified nurse midwives (CNMs), and clinician-trainees. Participants were asked about adapting training to the ob-gyn setting and their implementation experiences. Feedback was incorporated through iterative changes to training components.ResultsInterview and focus group discussion results from participants before (n = 3), during (n = 11) and after (n = 25) implementation guided intervention development and adaptation. Three virtual, asynchronous training components were created: a video and two interactive modules. This virtual format was favored due to challenges attending group meetings; however, participants noted opportunities to practice skills through role-play were lacking. Training modules were adapted to include common challenging vaccine conversations and live-action videos. Participants liked interactive training components and use of adult learning strategies. Some participants initially resisted the presumptive approach but later found it useful after applying it in their practices. Overall, participants reported that MI4MI training fit well with the prenatal context and recommended more inclusion of non-clinician staff.ConclusionsMI4MI training was viewed as relevant and useful for ob-gyn clinicians and staff. Suggestions included making training more interactive, and including more complex scenarios and non-clinician staff. 相似文献
2.
《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
3.
4.
5.
6.
《Digestive and liver disease》2022,54(11):1486-1493
BackgroundCold snare polypectomy (CSP) is a promising technique for the removal of sessile serrated polyps (SSPs) ≥ 10 mm. However, the efficacy and safety of this technique remain undetermined.AimsWe aimed to comprehensively evaluate the efficacy and safety of CSP for SSPs ≥ 10 mm.MethodsPubMed, EMBASE, Web of Science and Cochrane Library were searched up to January 2021.ResultsA total of 10 studies consisting of 1727 SSPs (range, 10–40 mm) from 1021 patients were included. The overall rates of technical success, adverse events (AEs) and residual SSPs were 100%, 0.7% and 2.9%, respectively. Subgroup analysis showed that the rates of technical success and AEs were comparable between CSP and cold endoscopic mucosal resection (EMR) (99.9% vs. 100% and 1.3% vs. 0.5%, respectively), between the proximal and distal colon (100% vs. 99.9% and 0.3% vs. 0, respectively), and between polyps of 10–19 mm and ≥20 mm (99.8% vs. 100% and 0.9% vs. 0, respectively). However, subgroup analysis showed that the rate of residual SSPs was slightly lower in CSP compared with cold EMR (1.3% vs. 3.9%), as well as in polyps of 10–19 mm compared with those ≥20 mm (3.1% vs. 4.7%).ConclusionCSP was an effective and safe technique for removing SSPs ≥ 10 mm. 相似文献
7.
8.
《Anaesthesia and Intensive Care Medicine》2019,20(11):644-650
This article focuses on the functional features of positive-pressure ventilators, the modes of invasive and non-invasive mechanical ventilation, and the main ventilator settings. It also highlights the potential complications of mechanical ventilation, the basic principles of weaning, and the pathophysiological basis of patient-ventilator dyssynchrony. 相似文献
9.
全膝关节置换术是目前治疗终末期膝关节骨性关节炎最有效的方法之一,全膝关节置换术后膝关节功能、术后膝关节疼痛与术后下肢力线有着密切的关系。目前膝关节置换术下肢对线方式主要采用机械力学对线方法,该方法可以改善膝关节功能,但是有部分患者也会产生术后膝关节的疼痛、活动受限等并发症,导致术后患者满意度较差。近些年越来越多的研究开始关注运动力学对线技术并应用于临床。运动学对线技术旨在重建患者的解剖结构,将膝关节假体运动轴与膝关节生理性运动轴保持一致,减少膝关节周围软组织和韧带的松解,实现膝关节生理性运动。该文就运动力学对线方法在全膝关节置换术中的应用进展作一综述。 相似文献
10.