全文获取类型
收费全文 | 35044篇 |
免费 | 1803篇 |
国内免费 | 492篇 |
专业分类
耳鼻咽喉 | 332篇 |
儿科学 | 673篇 |
妇产科学 | 588篇 |
基础医学 | 2131篇 |
口腔科学 | 725篇 |
临床医学 | 5582篇 |
内科学 | 5059篇 |
皮肤病学 | 250篇 |
神经病学 | 2411篇 |
特种医学 | 728篇 |
外科学 | 3302篇 |
综合类 | 3052篇 |
现状与发展 | 2篇 |
一般理论 | 15篇 |
预防医学 | 6482篇 |
眼科学 | 516篇 |
药学 | 3350篇 |
31篇 | |
中国医学 | 1140篇 |
肿瘤学 | 970篇 |
出版年
2024年 | 37篇 |
2023年 | 900篇 |
2022年 | 1682篇 |
2021年 | 2480篇 |
2020年 | 2348篇 |
2019年 | 2855篇 |
2018年 | 2584篇 |
2017年 | 1871篇 |
2016年 | 1505篇 |
2015年 | 1157篇 |
2014年 | 2277篇 |
2013年 | 3241篇 |
2012年 | 2529篇 |
2011年 | 1791篇 |
2010年 | 1386篇 |
2009年 | 1024篇 |
2008年 | 845篇 |
2007年 | 851篇 |
2006年 | 689篇 |
2005年 | 553篇 |
2004年 | 497篇 |
2003年 | 398篇 |
2002年 | 385篇 |
2001年 | 341篇 |
2000年 | 359篇 |
1999年 | 297篇 |
1998年 | 223篇 |
1997年 | 218篇 |
1996年 | 163篇 |
1995年 | 183篇 |
1994年 | 150篇 |
1993年 | 106篇 |
1992年 | 113篇 |
1991年 | 90篇 |
1990年 | 65篇 |
1989年 | 59篇 |
1988年 | 51篇 |
1987年 | 30篇 |
1985年 | 175篇 |
1984年 | 165篇 |
1983年 | 104篇 |
1982年 | 96篇 |
1981年 | 93篇 |
1980年 | 66篇 |
1979年 | 63篇 |
1978年 | 43篇 |
1977年 | 43篇 |
1976年 | 28篇 |
1975年 | 32篇 |
1973年 | 28篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
Antonio Sierra-Cedillo Miriam Figueroa-Olea Silvia Izazola-Ezquerro Rolando Rivera-González 《Early child development and care》2019,189(6):883-895
The concept of participation was reviewed as a component of children's citizenship in order to promote a programme for Integral Development. A narrative revision of the literature was carried out as well as a group discussion was organized along with the staff of an Integral Care Programme, in order to identify notions of democracy and child citizenship related to care and rearing. Some elements that favoured the child participation and some parenting skills were identified. Among the elements that must be encouraged in children are: the development of emotional, cognitive and communicative skills and promotion of decision-making; among the parent skills development included are: sensitivity and responsivity; establishing routines and participation experiences. It is important to stand out that the identified elements to promote child participation and parental competences should be adapted to every specific cultural context. 相似文献
82.
AbstractThe autoimmune condition Hashimoto’s thyroiditis (HT) is a disease wherein lymphocytes mediate the autoimmune damage and destruction of the thyroid gland. There are currently no effective means of treating HT, with the primary strategies of thyroid hormone therapy, surgery, or immunomodulatory therapy being associated with serious risks and side effects. There is thus a clear and urgent need to identify novel treatments for HT. In this study, we utilize female SD rats induced HT to evaluated the ability of transplanted MSCs to regulate Th17/Treg interactions in a rat Hashimoto’s thyroiditis (HT) model system. The results showed that Rats in the HT model group exhibited increased thyroid autoantibody levels consistent with successful model development, whereas these levels were lower in rats treated with MSCs. There were also fewer thyroid lesions and less lymphoid infiltration of the thyroid in MSC-treated rats relative to HT model rats, as well as fewer Th17 cells and more Treg cells – an observation consistent with the cytokine analyses. All of these showed that MSCs can regulate Th17/Treg interactions in a rat Hashimoto’s thyroiditis (HT) model system. It suggested that transplanted MSCs could be a potential immunotherapy strategy for the treatment of Hashimoto’s thyroiditis. 相似文献
83.
Background and objectivesPatients with cancer experience many side effects due to its nature and usual treatments. Sleep disorders and anorexia are the most commonly reported symptoms in cancer patients undergoing chemotherapy. The present study aimed to investigate the effect of Benson's Relaxation Response (BRR) on sleep quality and anorexia in cancer patients undergoing chemotherapy.Methodology and participantsIn the present clinical trial, a total of 84 patients were enrolled and randomly divided into two groups of experimental and control. Benson's relaxation response was administered to the experimental group twice a day over 5 consecutive days. Data was collected using St. Mary's Hospital Sleep Questionnaire (SMHSQ) and anorexia questionnaire with Visual Analog Scale (VAS).ResultsThe results of our study showed a significant improvement in the sleep quality in the experimental group at 24 (p = 0.02) and 48 (p = 0.001) hours after the intervention compared to the control group. Benson's relaxation response (BRR) also had a significant effect on the anorexia in the experimental group at 24 (7.5 ± 1.6) and 48 (6.9 ± 2.1) hours after the intervention compared to the control group. No side effects were reported during the study and follow-up period.ConclusionBenson's relaxation response as a complementary method may improve sleep quality and anorexia in cancer patients undergoing chemotherapy. Further studies with greater sample size and longer follow-up period are needed to confirm the current findings. 相似文献
84.
该文总结该市2017年1月-2018年12月之间,在无偿献血宣传招募方面工作内容。结果显示2018年较2017年献血总量有所提升,其中团体献血所占比例逐渐上升,街头献血所占比例逐渐下降。通过大力宣传无偿献血工作,扩大无偿献血团体招募工作,完善并深化无偿献血各项制度,使得普通群众的无偿献血认知度不断提高。 相似文献
85.
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
86.
《Journal of endodontics》2019,45(6):742-749
IntroductionThis study evaluated free water loss–induced residual strain with and without axial compressive loading and assessed the mechanical effect of cyclic loading in fully hydrated and partially dehydrated root dentin.MethodsRoot dentin sections prepared from freshly extracted human premolars were used. Customized 3-dimensional digital image correlation was used to qualitatively and quantitatively analyze the residual strain induced by 2 hours of free water loss in different regions of root dentin. Residual strain in partially dehydrated root dentin during axial compressive loading was also analyzed using 3-dimensional digital image correlation. The effect of cyclic loading on load to fracture in fully hydrated and partially dehydrated dentin and their fractography were analyzed using micro–computed tomographic imaging.ResultsFree water loss resulted in a heterogeneous distribution of residual strain and an overall formation of residual compressive strain with areas of tensile strain localized to the root canal and outer dentin. More residual compressive strain was observed in the apical dentin compared with the cervical dentin (P < .05), and more residual shear strain was observed in outer dentin compared with inner dentin (P < .05). Axial loading resulted in an increase in the load-induced compressive strain in the direction perpendicular to dentinal tubules (P < .05). Fully hydrated roots displayed a higher mean (P < .05) and median (P < .05) number of cycles to fracture with microcracks characteristic of toughness.ConclusionsAfter free water loss, root dentin displayed an increased formation of heterogenous residual strain, which resulted in increased axial compressive load-induced strain and a decreased resistance to fatigue failure. The effect of free water loss in the loss of mechanical integrity of root-filled teeth needs further investigation. 相似文献
87.
88.
89.
《The journal of sexual medicine》2020,17(10):2108-2112
BackgroundIn the last decade, many novel minimally invasive surgical techniques within benign prostatic hyperplasia (BPH) surgery were developed to reduce postoperative complications that often discourage patients from pursuing BPH surgery.AimTo assess perspective of future and past international BPH surgery patients regarding their postoperative complications, namely erectile and ejaculatory function.MethodsA survey was distributed randomly to 2 groups of BPH patients: one with 149 patients having undergone surgery in the last 2 years (group A), and the other cohort of 151 men seriously considering BPH surgery in the next year (group B). This survey consisted of 20 questions that assessed patients' motivating factors for undergoing elective BPH surgery and their perspectives regarding the potential postoperative complications attributed to BPH surgery.OutcomesThe perspective of future and past international BPH surgical patients towards the preservation of their erectile and ejaculatory functions was assessed with the help of a survey.ResultsResults indicated that in general BPH surgery patients considered the maintenance of erectile (95%, n = 284) and ejaculatory function (92%, n = 276) to be important preoperative considerations, regardless of their age. Patients aged 50–59 years were most concerned with the permanent impact on sexual function and patients aged >60 years were most concerned with urinary incontinence. In patients aged >70 years, 66% (n = 43) and 62% (n = 40) of the respondents indicated that maintaining erectile and ejaculatory function was important, respectively.Clinical ImplicationsPatient-centered care needs to be implemented in order to address the importance that past and future BPH surgery patients hold toward the maintenance of their postoperative sexual function.Strengths & LimitationsIn the group of patients having previously undergone BPH surgery, the possibility of recall bias should be taken into account when interpreting the study's findings. However, maintaining sexual function was also important for the group of patients seriously considering surgery in the next year suggesting that these considerations are not solely due to recall bias. Additionally, the results were limited by the small sample size of participants in groups A (n = 149) and B (n = 151).ConclusionIt was found that past and future BPH surgery patients attribute a significant importance toward the maintenance of their sexual function. Although novel approaches with better sexual outcomes such as Rezum and UroLift for prostates <80 mL, and Aquablation for any size prostate are available, more research is needed to investigate their long-term effects on sexual function before they can be recommended to patients.Bouhadana D, Nguyen D-D, Zorn KC, et al. Patient Perspectives on Benign Prostatic Hyperplasia Surgery: A Focus on Sexual Health. J Sex Med 2020;17:2108–2112. 相似文献
90.