全文获取类型
收费全文 | 31575篇 |
免费 | 1668篇 |
国内免费 | 756篇 |
专业分类
耳鼻咽喉 | 762篇 |
儿科学 | 4663篇 |
妇产科学 | 284篇 |
基础医学 | 1495篇 |
口腔科学 | 332篇 |
临床医学 | 2967篇 |
内科学 | 2955篇 |
皮肤病学 | 131篇 |
神经病学 | 2546篇 |
特种医学 | 888篇 |
外科学 | 2714篇 |
综合类 | 4689篇 |
预防医学 | 4407篇 |
眼科学 | 340篇 |
药学 | 2915篇 |
30篇 | |
中国医学 | 1603篇 |
肿瘤学 | 278篇 |
出版年
2024年 | 75篇 |
2023年 | 460篇 |
2022年 | 1042篇 |
2021年 | 1324篇 |
2020年 | 1079篇 |
2019年 | 1006篇 |
2018年 | 973篇 |
2017年 | 943篇 |
2016年 | 1162篇 |
2015年 | 1028篇 |
2014年 | 2563篇 |
2013年 | 2366篇 |
2012年 | 2231篇 |
2011年 | 2353篇 |
2010年 | 1838篇 |
2009年 | 1772篇 |
2008年 | 1669篇 |
2007年 | 1679篇 |
2006年 | 1404篇 |
2005年 | 1136篇 |
2004年 | 903篇 |
2003年 | 686篇 |
2002年 | 516篇 |
2001年 | 560篇 |
2000年 | 486篇 |
1999年 | 350篇 |
1998年 | 304篇 |
1997年 | 236篇 |
1996年 | 206篇 |
1995年 | 180篇 |
1994年 | 173篇 |
1993年 | 129篇 |
1992年 | 94篇 |
1991年 | 86篇 |
1990年 | 105篇 |
1989年 | 104篇 |
1988年 | 77篇 |
1987年 | 57篇 |
1986年 | 42篇 |
1985年 | 83篇 |
1984年 | 64篇 |
1982年 | 58篇 |
1981年 | 45篇 |
1980年 | 38篇 |
1979年 | 48篇 |
1978年 | 51篇 |
1977年 | 31篇 |
1976年 | 50篇 |
1974年 | 32篇 |
1973年 | 31篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Clinical characteristics of pediatric patients with COVID-19 between Omicron era vs. pre-Omicron era
《Journal of infection and chemotherapy》2022,28(11):1501-1505
IntroductionDetailed data on clinical characteristics in children with the omicron strain of SARS-COV-2 are limited.MethodsWe conducted a retrospective observational study of children with COVID-19 at the National Center for Child Health and Development to evaluate the clinical manifestations during and before the emergence of the omicron variant. Only symptomatic patients without underlying diseases were included. Participants were divided into two temporal groups: the “omicron era” (1/2022–2/2022) and the “pre-omicron era,” where the delta variant predominated (7/2021–11/2021). The patients were subclassified into an older vaccine-eligible group (aged 12–17 years), a younger vaccine-eligible group (aged 5–11 years), and a vaccine-ineligible group (aged 0–4 years).ResultsWe compared 113 patients in the omicron era with 106 in the pre-omicron era. Most patients in both eras had non-severe disease, and no patients required mechanical ventilation or died. Among patients aged 0–4 years, sore throat and hoarseness were more common during the omicron era than the pre-omicron era (11.1% vs. 0.0% and 11.1% vs. 1.5%, respectively). Croup syndrome was diagnosed in all patients with hoarseness. Among patients aged 5–11 years, vomiting was more frequent during the omicron era (47.2%) than during the pre-omicron era (21.7%). Cough and rhinorrhea were less common during the omicron era in patients aged 0–4 and 5–11 years, respectively, than during the pre-omicron era.ConclusionsIn children with COVID-19, clinical manifestations differed between the omicron and pre-omicron eras. In the Omicron era, croup syndrome was more frequent in vaccine-ineligible children. 相似文献
2.
3.
4.
《Vaccine》2022,40(18):2525-2527
5.
《Vaccine》2016,34(15):1773-1777
BackgroundThere are conflicting findings regarding the impact of residential mobility on immunisation status. Our aim was to determine whether there was any association between residential mobility and take up of immunisations and whether they were delayed in administration.MethodsWe carried out a cohort analysis of children born in Wales, UK. Uptake and time of immunisation were collected electronically. We defined frequent movers as those who had moved: 2 or more times in the period prior to the final scheduled on-time date (4 months) for 5 in 1 vaccinations; and 3 or more times in the period prior to the final scheduled on-time date (12 months) for MMR, pneumococcal and meningitis C vaccinations. We defined immunisations due at 2–4 months delayed if they had not been given by age 1; and those due at 12–13 months as delayed if they had not been given by age 2.ResultsUptake rates of routine immunisations and whether they were given within the specified timeframe were high for both groups. There was no increased risk (odds ratios (95% confidence intervals) between frequent movers compared to non-movers for the uptake of: primary MMR 1.08 (0.88–1.32); booster Meningitis C 1.65 (0.93–2.92); booster pneumococcal 1.60 (0.59–4.31); primary 5 in 1 1.28 (0.92–1.78); and timeliness: primary MMR 0.92 (0.79–1.07); booster Meningitis C 1.26 (0.77–2.07); booster pneumococcal 1.69 (0.23–12.14); and primary 5 in 1 1.04 (0.88–1.23).DiscussionFindings suggest that children who move home frequently are not adversely affected in terms of the uptake of immunisations and whether they were given within a specified timeframe. Both were high and may reflect proactive behaviour in the primary healthcare setting to meet Government coverage rates for immunisation. 相似文献
6.
Tonya J.H. White 《Journal of the American Academy of Child and Adolescent Psychiatry》2019,58(11):1042-1050
7.
8.
9.
目的:了解建德市基层医院儿科门诊进行X线扫描治疗中,家属对X射线检查的知情同意与接受现状。方法:随机抽取建德市属3家公立综合性医院共60位接受X线扫描的儿童患者家属为调查对象,发放自制调查问卷并统计分析。结果:55位(91.67%)患者表示治疗前主治医生只告知了X射线是诊断性检查,没有具体告知X射线的危害性;18位(30%)的患者家属不清楚辐射会对人体有损害,42位(70%)不清楚或不注意辐射警示标志,更不会主动要求防护措施,学历水平较高者及有从事医务工作背景者接受X射线检查的为12人(20%),明显低于学历水平低者或没有从事医务工作背景者的46人(76.67%),不知可否接受的有2人(3.33%)(P<0.001)。结论:基层医院儿科诊断性X射线扫描前的知情同意告知仍需加强,儿科放射检查偏多,应避免并加强宣传和教育。 相似文献
10.
目的 探讨台州市功能性消化不良的流行病学现状及影响因素。方法 回顾性选取2020年1月至2022年2月浙江省台州医院收治的功能性消化不良患者200例,统计患者的一般资料,分析该病的流行病学现状,对功能性消化不良的影响因素进行单因素分析,然后将差异有统计学意义的因素再进一步纳入多因素Logistic回归分析。结果 200例功能性消化不良患者中,女性发病率高于男性;30~60岁年龄段群体,患病率最高;存在暴饮暴食、喜食烫食、挑食、多食酸制品、未准时进食、常食宵夜、睡眠时间<6h、有药物过敏史、有功能性消化不良家族史、存在便秘情况者的患病率均高于未存在以上情况者,差异均有统计学意义(P<0.05)。多因素Logistic回归分析显示,性别、年龄、暴饮暴食、喜食烫食、挑食、多食酸制品、未准时进食、宵夜摄取情况、每天睡眠时间、药物过敏史、家族史、便秘是该病患病率升高的主要影响因素。结论 性别、年龄、暴饮暴食、喜食烫食、挑食、酸制品、未准时进食情况、宵夜摄取情况、每天睡眠时间、药物过敏史、家族史、便秘是功能性消化不良的主要影响因素。 相似文献