全文获取类型
收费全文 | 346384篇 |
免费 | 28358篇 |
国内免费 | 8176篇 |
专业分类
耳鼻咽喉 | 4201篇 |
儿科学 | 6742篇 |
妇产科学 | 5443篇 |
基础医学 | 24306篇 |
口腔科学 | 10054篇 |
临床医学 | 35300篇 |
内科学 | 40296篇 |
皮肤病学 | 4817篇 |
神经病学 | 16952篇 |
特种医学 | 9872篇 |
外国民族医学 | 49篇 |
外科学 | 33635篇 |
综合类 | 54480篇 |
现状与发展 | 33篇 |
一般理论 | 28篇 |
预防医学 | 35535篇 |
眼科学 | 4142篇 |
药学 | 31872篇 |
447篇 | |
中国医学 | 38398篇 |
肿瘤学 | 26316篇 |
出版年
2024年 | 1233篇 |
2023年 | 6399篇 |
2022年 | 11965篇 |
2021年 | 15874篇 |
2020年 | 15438篇 |
2019年 | 16276篇 |
2018年 | 14749篇 |
2017年 | 13607篇 |
2016年 | 13008篇 |
2015年 | 12376篇 |
2014年 | 24089篇 |
2013年 | 26343篇 |
2012年 | 20721篇 |
2011年 | 22395篇 |
2010年 | 18808篇 |
2009年 | 15835篇 |
2008年 | 14949篇 |
2007年 | 15530篇 |
2006年 | 13510篇 |
2005年 | 11536篇 |
2004年 | 9416篇 |
2003年 | 8494篇 |
2002年 | 6677篇 |
2001年 | 5773篇 |
2000年 | 4933篇 |
1999年 | 3933篇 |
1998年 | 3184篇 |
1997年 | 2778篇 |
1996年 | 2281篇 |
1995年 | 2123篇 |
1994年 | 1827篇 |
1993年 | 1525篇 |
1992年 | 1379篇 |
1991年 | 1248篇 |
1990年 | 1085篇 |
1989年 | 1018篇 |
1988年 | 963篇 |
1987年 | 839篇 |
1986年 | 741篇 |
1985年 | 2308篇 |
1984年 | 2605篇 |
1983年 | 1691篇 |
1982年 | 2133篇 |
1981年 | 1665篇 |
1980年 | 1405篇 |
1979年 | 1311篇 |
1978年 | 1050篇 |
1977年 | 750篇 |
1976年 | 957篇 |
1975年 | 692篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
《Cancer radiothérapie》2022,26(4):611-615
In order to provide more convenient irradiation regimens for patient comfort, radiation facility organization and health expenses, new hypofractionated protocols have been evaluated. Moderately (dose/fraction: 2.3 to 3 Gy), then ultra (dose/fraction: 5.2 to 6.1 Gy) hypofractionated irradiations were first validated. The current question is: is it possible to go forward using extreme hypofractionated regimens (EHR) based on 1 to 3 fractions. Different irradiation techniques are under investigation. However, brachytherapy remains the smartest way to deliver a high dose in a small volume. We report prospective and retrospective study results which evaluated EHR for breast and prostate brachytherapy. While oncological outcome and toxicity profile appear extremely encouraging for low-risk breast cancer after a 1 to 4 fractions (6.25 to 20 Gy/fraction), the use of a single fraction of 19 to 23 Gy appears debatable for prostate cancer. Brachytherapy represents an emblematic example of EHR but longer follow-up and more mature results are awaited in order to specify the right indications and refine the EQD2 calculation method including new biological and technical factors. 相似文献
2.
目的 系统评价翻转课堂教学模式在物理治疗学教学中的应用效果。方法 计算机检索CENTRAL、MEDLINE、EMBASE、CINAHL Plus、Academic Search Premier、Teacher Reference Center、ERIC以及Education Research,纳入翻转课堂教学模式应用于物理治疗学教学的原始研究。检索时限为建库至2021年6月。由2名研究人员独立完成文献筛选、数据提取、质量评价,对翻转课堂教学模式对比传统教学模式在物理治疗学教学中的效果进行综述。结果与结论 共检索文献1 307篇,最终纳入7篇,包括至少770名学生。发表时间集中在2013年至2019年,研究对象为物理治疗学专业学生,主要结局指标为考试成绩。翻转课堂教学模式总体说来可提高学生的笔试成绩,增强高阶思维能力,得到了学生和教师的积极评价。 相似文献
3.
4.
5.
目的 建立蒙药绿松石的质量标准。方法 收集不同产地绿松石,共10批。观察绿松石样品和粉末的性状并进行理化鉴别;按2020年版《中国药典》(四部)通则方法测定绿松石样品中水分、浸出物含量;采用原子吸收光谱法测定绿松石样品铜元素含量。结果 绿松石为不规则、周围带有黑石的块状物,表面蓝绿色,体重,质硬脆,难砸碎,断面呈贝壳状,蜡样光泽,粉末呈灰绿色,无臭,味淡;理化鉴别结果显示,呈铜盐反应;10批次样品中水分含量为0.41%-3.94%(SD=1.37%),浸出物含量为0.21%-0.81%(SD=0.21%),铜元素含量为3.03%-4.63%(SD=0.63%)。结论 初步拟定绿松石中水分含量不得超多5.0%、浸出物含量不得低于0.10%,铜元素含量应为2.60%-4.84%,制定的标准可用于蒙药材绿松石的质量控制。 相似文献
6.
7.
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
8.
9.
10.
《Health & place》2022
Whose values matter when considering which environment is healthier for a child whose guardianship is contested? The biological mother from a remote Australian Aboriginal community, who voluntarily relinquished her but has now requested her return? The foster mother who has cared for her in a metropolitan centre in another State of Australia, thousands of kilometres away? The welfare professionals who also live in that city? Or the child herself, who left her birth home and community five years earlier at the age of two? Drawing on a case study of a seven-year old Aboriginal girl, the authors argue that non-Indigenous values trumped Indigenous values without the realisation of key players who were empowered to make such determinations. The article uses Manuel DeLanda's neo-assemblage theory to consider the range of processes that exert themselves to shape place-values and social identity in colonised nations. It will also draw on Erik Erikson's and Lev Vygotsky's theories of psychosocial development to consider competing sets of values that raised feelings of dissonance within the child. Beliefs about what makes a place health-giving are revealed to be complex in colonised nations. Despite policy and legislative changes to better support Aboriginal people and their right to difference, non-Indigenous professionals can continue to be driven by an unrecognised systemic racism. While place-values are not, of course, the only (or perhaps even the most significant) consideration in guardianship determinations, this article will argue they can play a significant and covert role. 相似文献