全文获取类型
收费全文 | 244679篇 |
免费 | 21014篇 |
国内免费 | 5095篇 |
专业分类
耳鼻咽喉 | 3299篇 |
儿科学 | 4488篇 |
妇产科学 | 3936篇 |
基础医学 | 17372篇 |
口腔科学 | 7857篇 |
临床医学 | 23277篇 |
内科学 | 23226篇 |
皮肤病学 | 2750篇 |
神经病学 | 13099篇 |
特种医学 | 6054篇 |
外国民族医学 | 12篇 |
外科学 | 21355篇 |
综合类 | 40036篇 |
一般理论 | 30篇 |
预防医学 | 33686篇 |
眼科学 | 2232篇 |
药学 | 29697篇 |
417篇 | |
中国医学 | 28449篇 |
肿瘤学 | 9516篇 |
出版年
2023年 | 4668篇 |
2022年 | 7057篇 |
2021年 | 10965篇 |
2020年 | 11557篇 |
2019年 | 12631篇 |
2018年 | 11082篇 |
2017年 | 10095篇 |
2016年 | 8660篇 |
2015年 | 8148篇 |
2014年 | 16758篇 |
2013年 | 17968篇 |
2012年 | 15275篇 |
2011年 | 16395篇 |
2010年 | 13176篇 |
2009年 | 11432篇 |
2008年 | 10642篇 |
2007年 | 10820篇 |
2006年 | 9179篇 |
2005年 | 7754篇 |
2004年 | 6364篇 |
2003年 | 5740篇 |
2002年 | 4377篇 |
2001年 | 3706篇 |
2000年 | 3267篇 |
1999年 | 2667篇 |
1998年 | 1972篇 |
1997年 | 1819篇 |
1996年 | 1541篇 |
1995年 | 1507篇 |
1994年 | 1330篇 |
1993年 | 1211篇 |
1992年 | 1128篇 |
1991年 | 998篇 |
1990年 | 881篇 |
1989年 | 823篇 |
1988年 | 790篇 |
1987年 | 674篇 |
1986年 | 635篇 |
1985年 | 1966篇 |
1984年 | 2234篇 |
1983年 | 1399篇 |
1982年 | 1834篇 |
1981年 | 1272篇 |
1980年 | 1111篇 |
1979年 | 980篇 |
1978年 | 809篇 |
1977年 | 619篇 |
1976年 | 747篇 |
1975年 | 533篇 |
1974年 | 443篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
我国奶牛养殖规模不断扩大,奶业产值比重逐步提高,给奶牛疫病防治带来巨大压力。奶牛乳房炎及细菌性肺炎等呼吸系统疾病和细菌性肠炎等消化系统疾病最为常见,抗菌药物的使用成为主要防治手段。但抗菌药物的不当使用易使细菌产生耐药性,增加临床治疗的成本和难度,危害我国奶牛产业发展。本文对截至2021年7月我国和美国、英国、日本、欧盟批准用于奶牛的抗菌药物产品进行整理、统计与分析,包括抗菌药物的分类、剂型以及适应证等,旨在为我国奶牛用抗菌药物管理、合理用药和新兽药开发提供参考。 相似文献
4.
目的:探讨基于虚拟教研室的公共卫生安全素养培育课程构建及实践。方法:选取某医学院校专科护理专业学生(护生)为研究对象,将护理1班45人作为试验组,将护理2班43人作为对照组,对照组对公共卫生安全知识实施线上与线下的常规教学,试验组实施基于虚拟教研室的公共卫生安全素养培育课程。比较两组护生内容掌握情况及学习满意度。结果:试验组护生的学习成绩明显高于对照组(P<0.01),试验组护生对教学的满意度为95.6%(43/45),明显高于对照组(P<0.05)。结论:基于虚拟教研室的公共卫生安全素养培育课程构建既可以广泛促进不同专业教师进行教学研究交流,全面提高教师教书育人能力,又可以使护生在学习过程中接触不同专业、不同领域的知识与技能,注重护生主体作用,提高学习效果和学习满意度。 相似文献
5.
目的 基于《国际功能、残疾和健康分类》(ICF)构建智力和发展性残疾儿童青少年身体活动效益系统综述的范畴和PICO架构,探讨智力和发展性残疾儿童和青少年参加身体活动的健康效益。 相似文献
6.
【目的】 对术语使用情况进行调研,找出术语使用不规范的问题,为提升我国科技期刊术语规范化水平、推进科技期刊高质量发展提供依据。【方法】 采用回顾性调查方法,选择18种科技期刊2020年全年刊出的所有文章,调查其中术语使用差错情况。【结果】 术语相关差错主要涉及术语使用规范问题、术语编校规范问题及专有名词术语规范问题,具体差错类型比较多样化,不利于期刊质量及影响力的提升,应引起论文作者及期刊工作者的高度重视。术语相关差错中,术语使用规范问题最为突出;术语使用规范问题的各种类型中,术语形音义相近而误的现象最为突出。【结论】 我国科技期刊术语规范化水平有待提升,需要引起重视。 相似文献
7.
《Vaccine》2022,40(52):7604-7612
Background and ObjectiveVaccine uptake during pregnancy remains low. Our objectives were to describe 1) development and adaptation of a clinician communication training intervention for maternal immunizations and 2) obstetrics and gynecology (ob-gyn) clinician and staff perspectives on the intervention and fit for the prenatal care context.MethodsDesign of the Motivational Interviewing for Maternal Immunizations (MI4MI) intervention was based on similar communication training interventions for pediatric settings and included presumptive initiation of vaccine recommendations (“You’re due for two vaccines today”) combined with motivational interviewing (MI) for hesitant patients. Interviews and focus group discussions were conducted with ob-gyn clinicians and staff in five Colorado clinics including settings with obstetric physicians, certified nurse midwives (CNMs), and clinician-trainees. Participants were asked about adapting training to the ob-gyn setting and their implementation experiences. Feedback was incorporated through iterative changes to training components.ResultsInterview and focus group discussion results from participants before (n = 3), during (n = 11) and after (n = 25) implementation guided intervention development and adaptation. Three virtual, asynchronous training components were created: a video and two interactive modules. This virtual format was favored due to challenges attending group meetings; however, participants noted opportunities to practice skills through role-play were lacking. Training modules were adapted to include common challenging vaccine conversations and live-action videos. Participants liked interactive training components and use of adult learning strategies. Some participants initially resisted the presumptive approach but later found it useful after applying it in their practices. Overall, participants reported that MI4MI training fit well with the prenatal context and recommended more inclusion of non-clinician staff.ConclusionsMI4MI training was viewed as relevant and useful for ob-gyn clinicians and staff. Suggestions included making training more interactive, and including more complex scenarios and non-clinician staff. 相似文献
8.
9.
Anna Maria Spera 《World Journal of Virology》2022,11(5):275-282
With a 5.3% of the global population involved, hepatitis B virus (HBV) is a major public health challenge requiring an urgent response. After a possible acute phase, the natural history of HBV infection can progress in chronicity. Patients with overt or occult HBV infection can undergo HBV reactivation (HBVr) in course of immunosuppressive treatments that, apart from oncological and hem-atological diseases, are also used in rheumatologic, gastrointestinal, neurological and dermatological settings, as well as to treat severe acute respiratory syndrome coronavirus 2 infection. The risk of HBV reactivation is related to the immune status of the patient and the baseline HBV infection condition. The aim of the present paper is to investigate the risk of HBVr in those not oncological settings in order to suggest strategies for preventing and treating this occurrence. The main studies about HBVr for patients with occult hepatitis B infection and chronic HBV infection affected by non-oncologic diseases eligible for immunosuppressive treatment have been analyzed. The occurrence of this challenging event can be reduced screening the population eligible for immunosuppressant to assess the best strategies according to any virological status. Further prospective studies are needed to increase data on the risk of HBVr related to newer immunomodulant agents employed in non-oncological setting. 相似文献
10.
AimTo evaluate the surgery program strategy adopted in an adult otorhinolaryngology and head and neck surgery department in an area badly affected by the Covid-19 epidemic peak. The main objective was to analyze the reasons for not cancelling surgeries and the postoperative course of operated patients. The secondary objective was to assess the situation of postponed patients.Material and MethodsA single-center observational study carried out during the COVID-19 period in France included 124 patients scheduled for surgery during the period March 21-May 20, 2020. The number and nature of operations, both performed and postponed, were reviewed.ResultsA total of 54.0% patients were operated on during the COVID period and 46.0% were postponed. Operations were maintained in urgent or semi-urgent cases. The operated patients did not show any signs of infection during their hospital stay. A total of 29.8% of postponed patients were lost to follow-up and 49.1% were rescheduled.ConclusionThe application of national and international recommendations minimized the risk of loss of chance for operated patients without increasing the risk of contamination. The postponement of canceled operations resulted in considerable loss to follow-up. Intensified follow-up is necessary for these patients. 相似文献