全文获取类型
收费全文 | 146218篇 |
免费 | 15270篇 |
国内免费 | 4377篇 |
专业分类
耳鼻咽喉 | 1146篇 |
儿科学 | 2242篇 |
妇产科学 | 1445篇 |
基础医学 | 21405篇 |
口腔科学 | 3261篇 |
临床医学 | 19353篇 |
内科学 | 23125篇 |
皮肤病学 | 2047篇 |
神经病学 | 13896篇 |
特种医学 | 3686篇 |
外国民族医学 | 32篇 |
外科学 | 10263篇 |
综合类 | 16702篇 |
现状与发展 | 14篇 |
预防医学 | 9451篇 |
眼科学 | 1262篇 |
药学 | 20368篇 |
200篇 | |
中国医学 | 5536篇 |
肿瘤学 | 10431篇 |
出版年
2024年 | 150篇 |
2023年 | 2744篇 |
2022年 | 3743篇 |
2021年 | 6784篇 |
2020年 | 6670篇 |
2019年 | 6422篇 |
2018年 | 6123篇 |
2017年 | 6158篇 |
2016年 | 5972篇 |
2015年 | 6512篇 |
2014年 | 10677篇 |
2013年 | 11617篇 |
2012年 | 9388篇 |
2011年 | 10355篇 |
2010年 | 8107篇 |
2009年 | 7683篇 |
2008年 | 7494篇 |
2007年 | 6708篇 |
2006年 | 5588篇 |
2005年 | 4897篇 |
2004年 | 4030篇 |
2003年 | 3522篇 |
2002年 | 2657篇 |
2001年 | 2247篇 |
2000年 | 1784篇 |
1999年 | 1546篇 |
1998年 | 1209篇 |
1997年 | 1232篇 |
1996年 | 1081篇 |
1995年 | 1223篇 |
1994年 | 1100篇 |
1993年 | 1028篇 |
1992年 | 835篇 |
1991年 | 738篇 |
1990年 | 622篇 |
1989年 | 522篇 |
1988年 | 511篇 |
1987年 | 494篇 |
1986年 | 590篇 |
1985年 | 795篇 |
1984年 | 749篇 |
1983年 | 592篇 |
1982年 | 599篇 |
1981年 | 497篇 |
1980年 | 456篇 |
1979年 | 381篇 |
1978年 | 232篇 |
1977年 | 193篇 |
1976年 | 201篇 |
1975年 | 122篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
《Research in social & administrative pharmacy》2022,18(9):3694-3698
In this paper, we argue that understanding and addressing the problem of poor-quality medical products requires a more interdisciplinary approach than has been evident to date. While prospective studies based on rigorous standardized methodologies are the gold standard for measuring the prevalence of poor-quality medical products and understanding their distribution nationally and internationally, they should be complemented by social science research to unpack the complex set of social, economic, and governance factors that underlie these patterns. In the following sections, we discuss specific examples of prospective quality surveys and of social science studies, highlighting the value of cross-sector partnerships in driving high-quality, policy-relevant research in this area. 相似文献
2.
目的:探讨会所康复模式在女性精神分裂症恢复期病人中的应用效果。方法:选取2019年2月—2020年3月精神科收治的100例女性精神分裂恢复期病人作为研究对象,按随机数字表法分为对照组、观察组各50例,对照组采取常规康复治疗,观察组在常规康复治疗基础上应用会所多维度康复治疗模式。采用阳性和阴性症状量表(PANSS)、疾病家庭负担量表(FBS)、日常生活能力量表(ADL)、生活满意度指数B量表(LSIB)评价两组病人干预前、干预3个月、干预6个月精神症状、家庭负担、日常生活能力、生活自理能力。结果:两组病人干预3个月、干预6个月PANSS、FBS、ADL及LSIB评分比较差异有统计学意义(P<0.05);两组组内干预前后PANSS、FBS、ADL及LSIB评分比较差异有统计学意义(P<0.05)。结论:女性精神分裂症病人在恢复阶段应用会所康复模式进行干预可改善其精神症状,缓解其家庭负担,调节其日常生活能力和生活自理能力,提升其生活满意度。 相似文献
3.
4.
BackgroundPost-operative elderly hip fracture patients require significant rehabilitation. Nandrolone is an anabolic steroid used to promote muscle growth. This study aims to examine the effect of nandrolone in improving rehabilitation and quality of life in elderly female patients with hip fractures undergoing hemiarthroplasty.MethodsThis is a double-blinded prospective randomized-controlled-trial consisting of female patients above the age of 65 with an isolated neck of femur fracture planned for a hip hemiarthroplasty. Participants were randomized into two arms of the study – 50 mg intramuscular nandrolone vs normal saline placebo administered on post-operative day 0, and weeks 2, 6 and 12. The participants were followed up across a 1-year period following the surgery. Clinical outcomes such as time taken to achieve rehabilitation milestones, distance of ambulation and thigh muscle girth, and functional scoring with SF-36 questionnaire were recorded at intervals of 2, 6 and 12 weeks, 6 months and 1 year following the surgery.ResultsThere were a total of 23 subjects with 11 in the steroid group and 12 in the placebo group. There was no significant difference in demographics and injury patterns between both groups. There was no significant difference for time taken to achieve various rehabilitation milestones and distance of ambulation. SF-36 scores on discharge and at 1-year follow-up mark were comparable. There was no difference in the complication rate between both groups.ConclusionIntra-muscular Nandrolone after hip surgery in elderly female patients does not result in short to mid-term improved rehabilitation or functional outcomes. Nandrolone did not result in increased short-term complications after hip surgery.Level of evidenceI. 相似文献
5.
目的 探讨集束化干预策略联合闭环管理模式对ICU多重耐药菌感染的防控效果。方法选取2020年1~12月EICU住院患者275例作为对照组,实施常规管理;2021年1~10月EICU住院患者239例作为观察组,在常规管理基础上实施集束化干预策略联合闭环管理。结果实施后,观察组多重耐药菌感染发生率明显低于对照组;患者住院日显著低于对照组,4项护理措施执行率(隔离标识、手卫生、环境消毒、医务人员相关知识知晓)、病原学送检率显著高于对照组(均P<0.05)。结论集束化干预联合信息化闭环管理可有效降低EICU多重耐药菌感染发生率。 相似文献
6.
7.
8.
9.
Dong-Xin Hu Qi-Feng Sun Lin Xu Hong-Da Lu Fan Zhang Zhen-Miao Li Ming-Yan Zhang 《World journal of gastroenterology : WJG》2022,28(4):464-478
BACKGROUND Esophageal squamous cell carcinoma(ESCC)is one of the most prevalent malignancies that seriously threaten people’s health worldwide.DEAD-box helicase 51(DDX51)is a member of the DEAD-box(DDX)RNA helicase family,and drives or inhibits tumor progression in multiple cancer types.AIM To determine whether DDX51 affects the biological behavior of ESCC.METHODS The expression of DDX51 in ESCC tumor tissues and adjacent normal tissues was detected by Immunohistochemistry(IHC)analyses and quantitative PCR(qPCR).We knocked down DDX51 in ESCC cell lines by using a small interfering RNA(siRNA)transfection.The proliferation,apoptosis,and mobility of DDX51 siRNAtransfected cells were detected.The effect of DDX51 on the phosphoinositide 3-kinase(PI3K)/AKT pathway was investigated by western blot analysis.A mouse xenograft model was established to investigate the effects of DDX51 knockdown on ESCC tumor growth.RESULTS DDX51 exhibited high expression in ESCC tissues compared with normal tissues and represented a poor prognosis in patients with ESCC.Knockdown of DDX51 induced inhibition of ESCC cell proliferation and promoted apoptosis.Moreover,DDX51 siRNA-expressing cells also exhibited lower migration and invasion rates.Investigations into the underlying mechanisms suggested that DDX51 knock down induced inactivation of the PI3K/AKT pathway,including decreased phosphorylation levels of phosphate and tensin homolog,PI3K,AKT,and mammalian target of rapamycin.Rescue experiments demonstrated that the AKT activator insulin-like growth factor 1 could reverse the inhibitory effects of DDX51 on ESCC malignant development.Finally,we injected DDX51 siRNA-transfected TE-1 cells into an animal model,which resulted in slower tumor growth.CONCLUSION Our study suggests for the first time that DDX51 promotes cancer cell proliferation by regulating the PI3K/AKT pathway;thus,DDX51 might be a therapeutic target for ESCC. 相似文献
10.
ADHD儿童认知障碍的主要特征之一是执行功能损害,涉及包括前额叶皮层在内的特定脑区域及多层级脑网络异常。执行功能按照功能性分为冷-热两方面:冷执行功能损害主要表现于反应抑制、工作记忆以及认知灵活性等;热执行功能损害通常涉及延迟满足、赏罚相关决策、自我调节及情绪调节等。ADHD儿童的执行功能评估应基于可信范式进行文化适应性调整。临床干预不能单一聚焦于冷执行功能,需关注儿童的身体发育以及热执行功能(情绪社会方面)的发展进程,结合其他共病与心理状况,进行全面的动态随访与干预,以达到最佳的长期疗效。 相似文献