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   82019篇
  免费   8545篇
  国内免费   1209篇
耳鼻咽喉   362篇
儿科学   1927篇
妇产科学   1723篇
基础医学   3726篇
口腔科学   1774篇
临床医学   14328篇
内科学   12472篇
皮肤病学   645篇
神经病学   3710篇
特种医学   1304篇
外国民族医学   2篇
外科学   8358篇
综合类   10510篇
现状与发展   12篇
一般理论   12篇
预防医学   18359篇
眼科学   816篇
药学   6298篇
  139篇
中国医学   932篇
肿瘤学   4364篇
  2024年   150篇
  2023年   1913篇
  2022年   2571篇
  2021年   4751篇
  2020年   5014篇
  2019年   3848篇
  2018年   3744篇
  2017年   3591篇
  2016年   3687篇
  2015年   3470篇
  2014年   6918篇
  2013年   7426篇
  2012年   5401篇
  2011年   5569篇
  2010年   4439篇
  2009年   3939篇
  2008年   3983篇
  2007年   3535篇
  2006年   3212篇
  2005年   2637篇
  2004年   2179篇
  2003年   1720篇
  2002年   1361篇
  2001年   1143篇
  2000年   886篇
  1999年   710篇
  1998年   655篇
  1997年   523篇
  1996年   417篇
  1995年   357篇
  1994年   300篇
  1993年   309篇
  1992年   220篇
  1991年   201篇
  1990年   140篇
  1989年   132篇
  1988年   117篇
  1987年   91篇
  1986年   77篇
  1985年   113篇
  1984年   81篇
  1983年   49篇
  1982年   54篇
  1981年   43篇
  1980年   38篇
  1979年   17篇
  1978年   14篇
  1977年   12篇
  1976年   6篇
  1974年   5篇
排序方式: 共有10000条查询结果,搜索用时 187 毫秒
51.
52.
53.
54.
Background and aimThis network meta-analysis (NMA) compares the effects of different types of olive oil (OO) on cardiovascular risk factors.Methods and resultsLiterature search was conducted on three electronic databases (Medline, Web of Science, and Cochrane Central). Inclusion criteria: Randomized controlled trials (RCTs) (≥3 weeks duration of intervention) comparing at least two of the following types of OO: refined OO (ROO), mixed OO (MOO), low phenolic (extra) virgin OO (LP(E)VOO), and high phenolic (extra) virgin OO (HP(E)VOO). Random-effects NMA was performed for seven outcomes; and surface under the cumulative ranking curve (SUCRA) was estimated, using an analytical approach (P-score). Thirteen RCTs (16 reports) with 611 mainly healthy participants (mean age: 26–70 years) were identified. No differences for total cholesterol, HDL-cholesterol, triacylglycerols, and diastolic blood pressure were observed comparing ROO, MOO, LP(E)VOO and HP(E)VOO. HP(E)VOO slightly reduce LDL-cholesterol (LDL-C) compared to LP(E)VOO (mean difference [MD]: −0.14 mmol/L, 95%–CI: −0.28, −0.01). Both, HP(E)VOO and LP(E)VOO reduces SBP compared to ROO (range of MD: −2.99 to −2.87 mmHg), and HP(E)VOO may improve oxidized LDL-cholesterol (oxLDL-C) compared to ROO (standardized MD: −0.68, 95%–CI: −1.31, −0.04). In secondary analyses, EVOO may reduce oxLDL-C compared to ROO, and a dose-response relationship between higher intakes of phenolic compounds from OO and lower SBP and oxLDL-C values was detected. HP(E)VOO was ranked as best treatment for LDL-C (P-score: 0.83), oxLDL-C (0.88), and SBP (0.75).ConclusionsHP(E)VOO may improve some cardiovascular risk factors, however, public health implications are limited by overall low or moderate certainty of evidence.  相似文献   
55.
56.
近几年,"劳务派遣"成了医疗机构终末消毒、保洁、垃圾回收等工作新的用工形式。由于多数用工单位和用人单位不清楚对劳务派遣人员职业健康管理中各自应承担的责任和义务,以至于劳务派遣工在劳动过程中应享有的劳动保护权益未获得切实保障。本文就某医疗机构核医学工作场所劳务派遣保洁人员的职业健康管理监督案例进行讨论。  相似文献   
57.
58.
《Revue neurologique》2019,175(9):519-527
Background and purposeHospitals admitting acute strokes should offer access to mechanical thrombectomy (MT), but local organisations are still based on facilities available before MT was proven effective. MT rates and outcomes at population levels are needed to adapt organisations. We evaluated rates of MT and outcomes in inhabitants from the North-of-France (NoF) area.MethodWe prospectively evaluated rates of MT and outcomes of patients at 3 months, good outcomes being defined as a modified Rankin scale (mRS) 0 to 2 or like the pre-stroke mRS.ResultsDuring the study period (2016–2017), 666 patients underwent MT (454, 68.1% associated with intravenous thrombolysis [IVT]). Besides, 1595 other patients received IVT alone. The rate of MT was 81 (95% confidence interval [CI] 72–90) per million inhabitants-year, ranging from 36 to 108 between districts. The rate of IVT was 249 (95% CI 234–264) per million inhabitants-year, ranging from 155 to 268. After 3 months, 279 (41.9%) patients who underwent MT had good outcomes, and 167 (25.1%) had died. Patients living outside the district of Lille where the only MT centre is, were less likely to have good outcomes at 3 months, after adjustment on age, sex, baseline severity, and delay.ConclusionThe rate of MT is one of the highest reported up to now, even in low-rate districts, but outcomes were significantly worse in patients living outside the district of Lille, and this is not only explained by the delay.  相似文献   
59.
《Annals of hepatology》2019,18(4):563-570
Introduction and ObjectivesNonalcoholic fatty liver disease (NAFLD) can be considered one of the most common causes of liver disease in our days and is regarded as one of the newest vascular risk factors for cerebrovascular and other neurological diseases.Materials and methodsWe studied a group of neurological outpatients, divided into two homogenous groups based on the presence or absence of NAFLD.Results and conclusionsWe testified an independent relationship between NAFLD and common vascular risk factors (age, sex, educational level, BMI, cholesterol and lipid assessment, Hb1ac). At the same time, we ascertained an independent relationship between NAFLD and more recently recognized vascular risk factors, such as lack of folate, vitamin B12 and vitamin D-OH25, and increased levels of homocysteine. Finally, we have documented that NAFLD showed worse executive and frontal functions, and behavioral changes, such as depressive mood and anxiety, and apathy.  相似文献   
60.
阐述当前“人工智能+X”背景下市场对医学信息管理专业人才能力的需求,分析医学信息管理专业人才培养现状,提出从重塑学科人才培养目标、优化课程内容与课程设置、建设“双师型”导师队伍、搭建多方协同共建共享在线平台及设立“政用产学研”联合培养基地等方面探索医学信息管理专业研究生培养模式,以期培养适应人工智能时代发展,具备学科优势特色的高层次、高水平、高质量的复合型、应用型、创新型人才。  相似文献   
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