全文获取类型
收费全文 | 24523篇 |
免费 | 2042篇 |
国内免费 | 397篇 |
专业分类
耳鼻咽喉 | 105篇 |
儿科学 | 830篇 |
妇产科学 | 271篇 |
基础医学 | 1595篇 |
口腔科学 | 1001篇 |
临床医学 | 3157篇 |
内科学 | 4632篇 |
皮肤病学 | 182篇 |
神经病学 | 1767篇 |
特种医学 | 383篇 |
外国民族医学 | 1篇 |
外科学 | 2175篇 |
综合类 | 2663篇 |
现状与发展 | 1篇 |
预防医学 | 5264篇 |
眼科学 | 146篇 |
药学 | 1170篇 |
33篇 | |
中国医学 | 456篇 |
肿瘤学 | 1130篇 |
出版年
2024年 | 82篇 |
2023年 | 554篇 |
2022年 | 1513篇 |
2021年 | 1802篇 |
2020年 | 1240篇 |
2019年 | 1041篇 |
2018年 | 994篇 |
2017年 | 968篇 |
2016年 | 881篇 |
2015年 | 913篇 |
2014年 | 1540篇 |
2013年 | 1840篇 |
2012年 | 1313篇 |
2011年 | 1428篇 |
2010年 | 1138篇 |
2009年 | 1203篇 |
2008年 | 1211篇 |
2007年 | 1145篇 |
2006年 | 868篇 |
2005年 | 724篇 |
2004年 | 619篇 |
2003年 | 536篇 |
2002年 | 468篇 |
2001年 | 368篇 |
2000年 | 316篇 |
1999年 | 256篇 |
1998年 | 243篇 |
1997年 | 218篇 |
1996年 | 161篇 |
1995年 | 176篇 |
1994年 | 136篇 |
1993年 | 117篇 |
1992年 | 126篇 |
1991年 | 105篇 |
1990年 | 84篇 |
1989年 | 86篇 |
1988年 | 67篇 |
1987年 | 55篇 |
1986年 | 43篇 |
1985年 | 79篇 |
1984年 | 57篇 |
1983年 | 40篇 |
1982年 | 47篇 |
1981年 | 31篇 |
1980年 | 31篇 |
1979年 | 30篇 |
1978年 | 17篇 |
1977年 | 12篇 |
1976年 | 14篇 |
1972年 | 8篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
161.
Olubukola O. Nafiu Christian Mpody Marc P. Michalsky Joseph D. Tobias 《Surgery for obesity and related diseases》2021,17(7):1249-1255
BackgroundRacial disparities in postsurgical complications are often presumed to be due to a higher preoperative co-morbidity burden among patients of black race, although being relatively healthy is not a prerequisite for a complication-free postoperative course.ObjectivesTo examine the association of race with short-term postbariatric surgery complications in seemingly healthy patients.SettingsMetabolic and Bariatric Surgery Accreditation and Quality Improvement Program database (2015–2018).MethodsWe studied a relatively healthy (American Society of Anesthesiologists physical status 1 or 2), propensity score–matched cohort of adult non-Hispanic black and non-Hispanic white bariatric surgery patients. We compared the risk-adjusted incidences of postoperative complications, serious adverse events, and measures of postoperative resource utilization across racial groups.ResultsWe identified 44,090 matched pairs of relatively healthy black and white bariatric surgery patients. Patients of black race were 72% more likely than those of white race to develop 1 or more postoperative complications (.7% versus .4%, respectively; odds ratio [OR], 1.72; 95% confidence interval [CI], 1.32–2.24; P < .01). Measures of postbariatric resource utilization were significantly higher in patients of black race than those of white race, including unplanned reoperations (1.3% versus 1.0%, respectively; OR, 1.28; 95% CI, 1.07–1.52; P = .01), unplanned readmissions (4.5% versus 3.0%, respectively; OR, 1.53; 95% CI, 1.38–1.69; P < .01), unplanned interventions (1.6% versus 1.2%, respectively; OR, 1.36; 95% CI, 1.16–1.60; P < .01), and extended hospital lengths of stay (51.2% versus 42.7%, respectively; OR, 1.41; 95% CI, 1.36–1.46; P < .01).ConclusionEven among relatively healthy patients, race appears to be an important determinant of postbariatric surgery complications and resource utilization. Research and interventions aimed at narrowing the racial disparities in bariatric surgery outcomes may need to broaden the focus beyond the racial variation in the preoperative co-morbidity burden. 相似文献
162.
ObjectiveTo assess whether patient socioeconomic status (SES) moderates the effectiveness of coordinated specialty care for first‐episode psychosis and to investigate possible mechanisms.Data SourcesA secondary analysis of data from the RAISE‐ETP Trial, which was conducted from 2010‐2014.Study DesignRAISE‐ETP was a cluster‐randomized trial comparing a coordinated specialty care (CSC) intervention called NAVIGATE with usual community care. We constructed a patient SES index based on parental education, parental occupational prestige, and race/ethnicity. After identifying correlates of SES, we used OLS regression analysis to estimate treatment effects on the major study outcomes across quartiles of the index. We also examined whether correlates of SES including the duration of untreated psychosis (DUP), and participation in NAVIGATE might account for the observed difference in effectiveness of CSC by SES.Principal FindingsThe trial sample had a similar SES distribution to the US population, and SES was positively correlated with all mental health outcomes and several potential moderators at baseline. CSC substantially improved the main trial outcomes compared to community care for patients in the highest SES quartile but had small and statistically insignificant benefits for the remaining 75% of patients. Intervention participation rates and several potential moderators did not explain this disparity.ConclusionsCSC may be more effective for high‐SES patients with early psychosis than low‐SES patients. Additional research is needed to understand why CSC is less effective for low‐SES patients and to develop methods to increase effectiveness for this subgroup. 相似文献
163.
164.
165.
Don E. Willis 《Sociology of health & illness》2021,43(1):220-237
A growing but limited body of research has identified the college student population as one that is particularly vulnerable to food insecurity. Early estimates of food insecurity prevalence among college students range from 14 to 60 per cent. The present study utilises original survey data collected from a random sample (n = 300) of college students enrolled at an urban university in the Midwest region of the United States of America (USA). This study examines the impact of food insecurity on health outcomes and the mediation of this relationship by subjective social status among college students. Ordinary least squares (OLS) and logistic regression analyses find that food insecurity is related to worse self-rated, physical and mental health among college students, and Sobel-Goodman tests find that subjective social status plays a significant mediating role in the relationship between food insecurity and health among college students. The implications of these findings in a university context are discussed using a psychosocial framework and insights from the stress process model. In doing so, I discuss food insecurity among college students with an emphasis on the social significance of food and food insecurity. 相似文献
166.
167.
目的 探究右美托咪定与丙泊酚对外科术后机械通气患者镇静效果及血流动力学的影响。方法 将我院60例外科手术后机械通气患者作为研究对象,电脑随机将其分成右美托咪定组和丙泊酚组,各30例。右美托咪定组给予右美托咪定治疗,丙泊酚组给予丙泊酚治疗,比较两种方法的镇静效果及对血流动力学的影响。结果 镇静30 min后,两组的Ramsay镇静评分对比差异无统计学意义(Z=1.23,P>0.05);右美托咪定组心动过缓(6.67%)、低血压(13.33%)、低血压合并心动过缓(3.33%)发生率分别低于丙泊酚组(30.00%、36.67%、26.67%),两组间对比差异有统计学意义(χ2分别为5.45、4.36、6.41,P均<0.05)。结论 给予外科术后机械通气患者右美托咪定或丙泊酚,均有更好的镇静效果,但右美托咪定对于血流动力学的影响较小,更适用于机械通气患者。 相似文献
168.
目的 分析贵阳市慢性病综合防控示范区重点慢性病死亡及早死概率情况,评价慢性病综合防控示范区居民健康水平。方法 利用贵阳市2018年5个慢性病综合防控示范区死亡监测数据,根据WHO推荐的早死概率计算方法,计算慢性病综合防控示范区居民心脑血管疾病、恶性肿瘤、慢性呼吸系统疾病和糖尿病等四类重点慢性病死亡水平和早死概率。结果 贵阳市慢性病综合防控示范区四类重点慢病报告死亡率为463.26/10万,其中男性死亡率为520.27/10万,女性死亡率为402.62/10万;城市居民死亡率为425.87/10万,农村为509.07/10万。四类重点慢病早死概率为15.95%,其中男性早死概率为20.64%,女性为10.87%,男性四大类重点慢病均高于女性;城市居民为14.75%,农村为17.39%,除糖尿病外,其余三类重点慢病农村地区早死概率均高于城市。结论 贵阳市慢性病综合防控示范区创建对降低因慢性非传染性疾病死亡具有积极的影响,应持续加大和推广慢病综合防控示范区建设。同时应对农村地区和男性群体的重点慢性病防控工作给予更多的政策和防控支持。 相似文献
169.
张睿 《中国卫生事业管理》2021,(3):220-225
医学院校人文社科发展水平是影响医学生人文精神培养、医学人文教育教学改革的决定性因素。研究选取河南省两所独立设置的本科医学院校,以河南省20所本科高校为参比对象,发现地方医学院校与综合性大学、其他行业类型高校在人文社科建设投入和产出方面存在较大差距,主要由于基础薄弱、受重视程度不够、资源投入有限等原因造成,医学院校应从重视人文社科发展、遵循学科发展规律、科学制定发展规划、完善激励机制等方面加强人文社科建设工作。 相似文献
170.
目的:了解天津市三级医院临床医生的科研现状、态度以及存在的问题,为提高临床科研成果转化提供理论依据。方法:2018年7月,采用目的抽样的方法,对天津市三级医院在职在岗的临床医生进行问卷调查,通过网络问卷调查平台收集问卷,共有93位临床医生参与问卷调查,其中三级综合医院62位,三级专科医院31位;利用SPSS19.0进行统计分析。结果:65.6%的临床医生认为有做科研的必要;55.9%的临床医生会选择主动做科研;74.2%的临床医生认为工作繁重,没有多余时间精力是限制其参与科研工作的首要因素;临床医生需要提高的科研技能为:学习科研设计、理论与技术培训、统计学方法的学习。结论:临床医生缺乏充足时间投入科研工作,且不具备实现科研目的能力,应该加强天津市“政、产、学、研”一体化的医学科技创新协作平台建设,不同机构承担不同角色,充分发挥各自优势共同发展,实现成果输出和转化最大化。 相似文献