全文获取类型
收费全文 | 47747篇 |
免费 | 1239篇 |
国内免费 | 155篇 |
专业分类
耳鼻咽喉 | 237篇 |
儿科学 | 105篇 |
妇产科学 | 167篇 |
基础医学 | 801篇 |
口腔科学 | 92篇 |
临床医学 | 26802篇 |
内科学 | 1110篇 |
皮肤病学 | 158篇 |
神经病学 | 777篇 |
特种医学 | 539篇 |
外科学 | 1431篇 |
综合类 | 7159篇 |
预防医学 | 3891篇 |
眼科学 | 30篇 |
药学 | 3759篇 |
94篇 | |
中国医学 | 1788篇 |
肿瘤学 | 201篇 |
出版年
2024年 | 43篇 |
2023年 | 627篇 |
2022年 | 1360篇 |
2021年 | 1561篇 |
2020年 | 1938篇 |
2019年 | 1584篇 |
2018年 | 1306篇 |
2017年 | 1235篇 |
2016年 | 1255篇 |
2015年 | 1405篇 |
2014年 | 4755篇 |
2013年 | 3773篇 |
2012年 | 4390篇 |
2011年 | 4912篇 |
2010年 | 4450篇 |
2009年 | 2815篇 |
2008年 | 2265篇 |
2007年 | 2393篇 |
2006年 | 2002篇 |
2005年 | 1506篇 |
2004年 | 956篇 |
2003年 | 771篇 |
2002年 | 382篇 |
2001年 | 283篇 |
2000年 | 207篇 |
1999年 | 250篇 |
1998年 | 142篇 |
1997年 | 108篇 |
1996年 | 70篇 |
1995年 | 64篇 |
1994年 | 37篇 |
1993年 | 19篇 |
1992年 | 33篇 |
1991年 | 17篇 |
1990年 | 18篇 |
1989年 | 10篇 |
1987年 | 7篇 |
1986年 | 10篇 |
1985年 | 29篇 |
1984年 | 20篇 |
1983年 | 15篇 |
1982年 | 13篇 |
1981年 | 23篇 |
1980年 | 19篇 |
1979年 | 14篇 |
1978年 | 10篇 |
1977年 | 11篇 |
1976年 | 6篇 |
1975年 | 6篇 |
1974年 | 6篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
《Collegian (Royal College of Nursing, Australia)》2020,27(4):381-387
BackgroundOur university commenced clinical placements for third-year nursing students in Prison Health Services (PHS) in 2014. Registered nurse preceptors employed in these services facilitated students’ experiential workplace learning, assessed their competence and assisted them to meet course objectives in this challenging environment. To date, no studies have examined preceptors’ experiences of supporting students in the prison health setting.AimThe study aim was to investigate preceptors’ perceptions of supporting nursing students undertaking clinical placements in PHS, in order to inform development of resources and processes.MethodsQualitative data were collected via a focus group and interviews with preceptors (n = 6) working in metropolitan PHS. Data underwent thematic analysis.FindingsParticipants valued the opportunity to support student learning, finding students contributed to the workplace by bringing in new ideas, and conducting beneficial projects. However, preceptors requested better rostering and workload management by their employer. They also wished for more detailed information from the university regarding student orientation and preparation to support student learning. They felt that the employer-provided preceptorship training did not fulfil their needs.DiscussionPreceptors in PHS settings shared many of the support needs of those in other settings, although some challenges were more specific to the setting.ConclusionThis paper makes recommendations on how preceptors in PHS can be better supported to fulfil the role. 相似文献
42.
目的 系统评价有关癌症患者心理韧性发展的真实体验,为更好地制定心理韧性干预方案提供理论依据。方法 计算机检索Cochrane Library、Medline、CINAHL、Embase、PubMed、Web of Science、Psyc INFO以及中国生物医学文献数据库、中国知网、维普、万方数据库从建库至2019年6月相关的质性研究。采用澳大利亚乔安娜布里格斯研究所循证卫生保健中心质性研究质量评价标准(2016)对文献进行评价,采用汇集性整合方法进行结果整合。结果 共纳入10篇文献,提炼42个明确的结果,形成8个类别,汇总成3个整合结果。①心理韧性发展是动态循环的过程:危机负性期,调节成长期,积极转化期,循环强化期;②心理韧性的阻碍因素:个体(消极应对,错误认知,症状和体象困扰),环境(传统社会文化,医疗环境,家庭负担);③心理韧性的保护因素:个体(积极心理与应对方式,复原经历,宗教信仰,自我表露,利他主义与行为),环境(家庭因素,医疗照护,人际支持)。结论 心理韧性的发展是动态循环过程,受个体和环境因素影响,医护人员应根据不同阶段的影响因素给予针对性护理措施,促进患者心理韧性的形成和发展,提高患者的生活质量。 相似文献
43.
44.
目的:提高静脉留置针使用有效期,保证心血管患者得到及时用药,有效开放静脉抢救通道。方法:建立了心血管患者静脉留置针的临床护理路径(Clinical Nursing Pathway,CNP)。选择我院2018年1-12月期间接诊的静脉留置针心血管患者为研究对象,共100例,随机分组,即对照组(50例,常规护理)与实验组(50例,在常规护理基础上辅以临床护理路径),比较两组护理效果,包括留置时间、不良反应情况、患者满意度等。结果:护理后,两组患者留置时间无明显差异,但实验组不良反应发生率、静脉炎发生率低于对照组,差异有统计学意义(P<0.05);实验组满意度、一次性置管成功率高于对照组,而非计划性拔管率则低于对照组,差异有统计学意义(P<0.05)。结论:心血管患者静脉留置针护理中辅以临床护理路径,可减少不良反应,预防静脉炎,延长置管时间,提高护理满意度,值得优选。 相似文献
45.
《Brain stimulation》2020,13(3):614-624
BackgroundStudies examining the contribution of contralesional brain regions to motor recovery after stroke have revealed conflicting results comprising both supporting and disturbing influences. Especially the relevance of contralesional brain regions beyond primary motor cortex (M1) has rarely been studied, particularly concerning the temporal dynamics post-stroke.MethodsWe, therefore, used online transcranial magnetic stimulation (TMS) interference to longitudinally assess the role of contralesional (right) frontoparietal areas for recovery of hand motor function after left hemispheric stroke: contralesional M1, contralesional dorsal premotor cortex (dPMC), and contralesional anterior intraparietal sulcus (IPS). Fourteen stroke patients and sixteen age-matched healthy subjects performed motor tasks of varying complexity with their (paretic) right hand. Motor performance was quantified using three-dimensional kinematic data. All patients were assessed twice, (i) in the first week, and (ii) after more than three months post-stroke.ResultsWhile we did not observe a significant effect of TMS interference on movement kinematics following the stimulation of contralesional M1 and dPMC in the first week post-stroke, we found improvements of motor performance upon interference with contralesional IPS across motor tasks early after stroke, an effect that persisted into the later phase. By contrast, for dPMC, TMS-induced deterioration of motor performance was only evident three months post-stroke, suggesting that a supportive role of contralesional premotor cortex might evolve with reorganization.ConclusionWe here highlight time-sensitive and region-specific effects of contralesional frontoparietal areas after left hemisphere stroke, which may influence on neuromodulation regimes aiming at supporting recovery of motor function post-stroke. 相似文献
46.
We have carried out a prospective randomised, single blind clinical trial to investigate the effect of continuous passive motion on range of knee flexion, lack of extension, pain levels and analgesic use after total knee replacement surgery. 85 subjects were randomly allocated to control or study group. All subjects followed the existing rehabilitation protocol, which permits immediate active range of motion exercises and mobilisation with the study group using continuous passive motion for 1 h, twice a day. Outcome measures employed were range of motion, pain assessed on a visual analogue scale and analgesic use according to the WHO ladder. Blinded evaluation was carried out preoperatively, at time of discharge from hospital, 6 weeks, 6 and 12 months postoperation. No significant difference was observed between groups at all time intervals for each outcome variable using Wilcoxon Rank sum tests. The results substantiate previous findings that short duration continuous passive motion following total knee arthroplasty does not influence outcome of range of motion or reported pain. 相似文献
47.
48.
49.
50.
目的观察前置胎盘孕妇的恐惧心理反应,做好前置胎盘孕妇的心理护理。方法由孕妇自行填写CES-D和SA2量表,进行统计学分析。结果70.2%的前置胎盘孕妇具有恐惧心理。结论在妊娠过程应提高孕妇认知水平,加强心理护理,有助于她们顺利渡过妊娠期。 相似文献