首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   19067篇
  免费   1411篇
  国内免费   358篇
耳鼻咽喉   106篇
儿科学   593篇
妇产科学   312篇
基础医学   1610篇
口腔科学   564篇
临床医学   1786篇
内科学   2637篇
皮肤病学   200篇
神经病学   1490篇
特种医学   1428篇
外科学   1832篇
综合类   1512篇
现状与发展   1篇
一般理论   2篇
预防医学   3631篇
眼科学   216篇
药学   1421篇
  3篇
中国医学   241篇
肿瘤学   1251篇
  2024年   21篇
  2023年   300篇
  2022年   339篇
  2021年   577篇
  2020年   706篇
  2019年   686篇
  2018年   624篇
  2017年   642篇
  2016年   672篇
  2015年   594篇
  2014年   1163篇
  2013年   1383篇
  2012年   1110篇
  2011年   1188篇
  2010年   866篇
  2009年   909篇
  2008年   870篇
  2007年   984篇
  2006年   824篇
  2005年   825篇
  2004年   733篇
  2003年   693篇
  2002年   521篇
  2001年   416篇
  2000年   329篇
  1999年   292篇
  1998年   240篇
  1997年   193篇
  1996年   150篇
  1995年   206篇
  1994年   200篇
  1993年   169篇
  1992年   201篇
  1991年   166篇
  1990年   105篇
  1989年   104篇
  1988年   117篇
  1987年   87篇
  1986年   76篇
  1985年   111篇
  1984年   75篇
  1983年   53篇
  1982年   65篇
  1981年   53篇
  1980年   44篇
  1979年   25篇
  1978年   40篇
  1977年   33篇
  1976年   17篇
  1975年   12篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
目的:比较关节镜双后内入路与切开手术治疗急性单纯后交叉韧带胫骨止点撕脱骨折的疗效差异。方法:回顾性分析2016年6月至2020年6月经手术治疗的52例急性单纯性后交叉韧带胫骨止点撕脱骨折患者的临床资料,按手术方案不同分为两组,关节镜组27例患者行关节镜双后内入路手术治疗,其中男16例,女11例,年龄19~52(34.9±9.2)岁;切开复位组25例患者行膝关节后内侧切口手术治疗,其中男14例,女11例,年龄18~54(33.7±8.4)岁。观察并比较两组患者手术时间、切口长度、术中出血量、住院时间、住院费用、术后愈合情况、并发症以及术后12个月Lysholm、IKDC评分。结果:两组患者均顺利完成手术,无血管、神经损伤。52例均获得随访,时间6~24(15.0±1.7)个月。关节镜组手术时间、住院费用大于切开复位组(P<0.05);关节镜组术中出血量、切口长度、住院时间小于切开复位组(P<0.05);关节镜组和切开复位组术后12个月Lysholm评分分别为(95.9±1.7)分和(86.4±1.2)分,均较术前的(49.1±2.3)分和(48.9±1.1)分显著提高(P<0.05);关节镜组和切开复位组术后12个月IKDC总分分别为(96.9±1.5)分和(87.1±1.4)分,均较术前的(47.6±4.1)分和(48.1±3.9)分显著提高(P<0.05);关节镜组术后12个月膝关节Lysholm、IKDC评分均高于切开复位组(P<0.05)。结论:关节镜双后内入路治疗急性单纯后交叉韧带胫骨止点撕脱骨折,早期效果满意,疗效优于传统开放手术,具有创伤小、恢复快、操作简便等优点。  相似文献   
3.
AimThe aim of this study was to analyse the patients’ role in clinical education in terms of facilitative student-patient relationship in Finland, Germany, Iceland, Ireland, Lithuania and Spain and factors promoting a more facilitative relationship in clinical education.BackgroundNursing students’ bedside learning is reliant on patients and the establishment of a person-centred approach develops from the relationships with patients.DesignA multi-country, cross-sectional design was implemented.MethodsSurvey data were collected from graduating nursing students and patients between May 2018 and March 2019. The survey consisted of a 13-item facilitative sub-scale of the Student-Patient Relationship Scale as the main outcome measure, which was identical for both populations. In addition, background factors were surveyed with single questions and other scales. Associations between facilitative relationship and background factors were studied with linear models.ResultsAltogether, 1796 students and 1327 patients answered the survey. Overall, both students and patients regarded their relationship as facilitative, but students’ (median 4.23, 95% confidence interval 4.15–4.23) evaluations were higher than patients’ (median 3.75, 95% confidence interval 3.69–3.77). The students’ and patients’ evaluations differed from each other significantly in all other countries except in Ireland and Lithuania. Corresponding associations for both populations were found in terms of the country and students’ cultural confidence.ConclusionsResults signal favourable grounds for students’ bedside learning and patient participation in clinical education with the potential to foster a person-centred approach.  相似文献   
4.
背景 广泛性焦虑障碍(GAD)是常见的慢性精神疾病,常伴有不同程度的认知功能损害,严重影响患者的生活质量及社会功能。 目的 比较GAD住院患者与健康对照者认知功能的差异。 方法 选取2018年8月至2020年1月在南方医科大学南方医院住院治疗的GAD患者为GAD组(n=30),同期通过广告在南方医科大学南方医院住院患者陪护人员中招募年龄、性别相匹配的健康志愿者为健康对照组(n=30)。使用汉密尔顿焦虑量表(HAMA)、汉密尔顿抑郁量表(HAMD)和Beck自杀意念量表中文版(BSI-CV)进行心理测评,采用精神运动警觉性任务(PVT)、Go/No-go联想任务、N-back任务分别评估认知功能的注意、抑制及工作记忆功能。比较两组一般情况、量表测评总分及认知功能差异,进一步采用多因素Logistic回归分析探究GAD住院患者和健康对照者的认知功能差异。 结果 GAD组HAMA、HAMD总分和最严重情况时BSI-CV总分及最严重情况时存在自杀意念者所占比例高于健康对照组(P<0.05)。N-back任务:GAD组1-back击中目标率(NBACK1a)、2-back击中目标率(NBACK2a)低于健康对照组,1-back击中目标的平均反应时(NBACK1b)长于健康对照组(P<0.05)。多因素Logistic回归分析结果显示,NBACK1a〔OR=0.946,95%CI(0.898,0.997),P=0.038〕、NBACK1b〔OR=1.007,95%CI(1.000,1.014),P=0.042〕是GAD的影响因素。 结论 与健康对照者相比,GAD住院患者的工作记忆较差,需要临床关注。  相似文献   
5.
BackgroundHeadache disorders are highly prevalent worldwide. Many headache sufferers search for answers outside medical and pharmaceutical models. Complementary and alternative medicine (CAM) including osteopathy are widely used by headache patients. Indeed 9% of patients consulting osteopaths do so for headaches. There is no existing assessment of headache knowledge among practising Osteopaths in the UK.MethodsThis study was a cross-sectional survey employing an anonymous online questionnaire. An original questionnaire was developed. The scope was based on established guidelines in the primary care setting. Multiple choice and closed-ended questions assessed knowledge of the diagnostic criteria, potential red flags and appropriate investigations. The answers were informed by the International Classification Headache Disorder (ICHD-3) and the British Association for the Study of Headaches (BASH) guidelines. Three case vignettes relevant to osteopathic practice were included. Participants were invited to give optional free text feedback. The questionnaire was open to be self-completed by participants for 30 days.ResultsThere were 398 responders of which 383 were included and all of whom completed the questionnaire. The study found areas where knowledge was good, areas where it was limited and areas of uncertainty. The mean knowledge score was 6.93 out of 10 (range 2.18–9.42). There was a significantly lower mean knowledge score in those who had no prior headache education of −0.716 with a difference in means (−1.075 to −0.353, 95% C.I.) compared to those with prior education. Gender and years qualified had no significant effect on mean knowledge score. Optional free text feedback was given by 81 (21.2%) of the respondents and analyzed. The main themes were acknowledgment of knowledge gaps and a desire for more headache education.ConclusionThe findings suggest there are gaps in the existing knowledge on headache among UK osteopaths and the extent of this is dependent on prior headache education. We propose that ongoing headache education among osteopaths is needed in the field.  相似文献   
6.
社区动脉粥样硬化风险(ARIC)研究是1987年由美国心、肺和血液研究所资助的关注非洲裔美国人心血管健康的最大研究。旨在调查心脏病的危险因素以及心血管疾病与认知之间的联系。ARIC研究的许多发现加深了对动脉粥样硬化性心血管病病因的了解,在心血管病预防领域做出了重大贡献,证明了以人群为基础的研究对改善健康和预防疾病的重要性。主要概述ARIC研究的起源、目的、研究设计、对心血管医学的贡献以及未来的发展方向。  相似文献   
7.
8.
9.
IntroductionThe sofosbuvir-velpatasvir (SOF/VEL) combination is a direct-acting antiviral therapy that is authorized and available in Mexico, making the performance of a real-world multicenter study that evaluates the sustained virologic response at 12 weeks post-treatment a relevant undertaking.MethodsA retrospective review of the case records of 241 patients seen at 20 hospitals in Mexico was conducted to assess hepatitis C treatment with the SOF/VEL combination (n = 231) and the sofosbuvir/velpatasvir/ribavirin (SOF/VEL/RBV) combination (n = 10). The primary efficacy endpoint was the percentage of patients that achieved SVR at 12 weeks after the end of treatment.ResultsOverall SVR was 98.8% (95% CI 97.35-100%). Only three patients did not achieve SVR, two of whom had cirrhosis and a history of previous treatment with peg-IFN. Of the subgroups analyzed, all the patients with HIV coinfection, three patients with genotype 3, and the patients treated with the SOF/VEL/RBV combination achieved SVR. The subgroups with the lower success rates were patients that were treatment-experienced (96.8%) and patients with F1 fibrosis (95.5%). The most frequent adverse events were fatigue, headache, and insomnia. No serious adverse events were reported.ConclusionTreatments with SOF/VEL and SOF/VEL/RBV were highly safe and effective, results coinciding with those of other international real-world studies.  相似文献   
10.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号