全文获取类型
收费全文 | 351648篇 |
免费 | 18380篇 |
国内免费 | 9451篇 |
专业分类
耳鼻咽喉 | 3355篇 |
儿科学 | 11044篇 |
妇产科学 | 5091篇 |
基础医学 | 28208篇 |
口腔科学 | 4832篇 |
临床医学 | 44307篇 |
内科学 | 69286篇 |
皮肤病学 | 3357篇 |
神经病学 | 18749篇 |
特种医学 | 19688篇 |
外国民族医学 | 24篇 |
外科学 | 45900篇 |
综合类 | 41763篇 |
现状与发展 | 34篇 |
预防医学 | 19999篇 |
眼科学 | 5720篇 |
药学 | 37061篇 |
156篇 | |
中国医学 | 8077篇 |
肿瘤学 | 12828篇 |
出版年
2023年 | 3192篇 |
2022年 | 5712篇 |
2021年 | 13621篇 |
2020年 | 8768篇 |
2019年 | 14047篇 |
2018年 | 9080篇 |
2017年 | 8147篇 |
2016年 | 10341篇 |
2015年 | 13286篇 |
2014年 | 25341篇 |
2013年 | 23944篇 |
2012年 | 25399篇 |
2011年 | 23035篇 |
2010年 | 20783篇 |
2009年 | 20311篇 |
2008年 | 19240篇 |
2007年 | 19609篇 |
2006年 | 17079篇 |
2005年 | 12642篇 |
2004年 | 8409篇 |
2003年 | 7348篇 |
2002年 | 5973篇 |
2001年 | 5461篇 |
2000年 | 4623篇 |
1999年 | 3732篇 |
1998年 | 3936篇 |
1997年 | 3758篇 |
1996年 | 2992篇 |
1995年 | 3186篇 |
1994年 | 2879篇 |
1993年 | 2348篇 |
1992年 | 2500篇 |
1991年 | 2208篇 |
1990年 | 2061篇 |
1989年 | 1871篇 |
1988年 | 1829篇 |
1987年 | 1599篇 |
1986年 | 1325篇 |
1985年 | 2350篇 |
1984年 | 2397篇 |
1983年 | 1572篇 |
1982年 | 1862篇 |
1981年 | 1719篇 |
1980年 | 1516篇 |
1979年 | 1271篇 |
1978年 | 982篇 |
1977年 | 943篇 |
1976年 | 811篇 |
1974年 | 557篇 |
1973年 | 551篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
《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
2.
3.
《Morphologie : bulletin de l'Association des anatomistes》2022,106(353):136-140
4.
《Vaccine》2022,40(52):7515-7519
The recent wave of COVID-19 cases has led to the potential need for booster doses. We surveyed 6,294 people and found that 87.6% reported willingness to take a booster dose, with vaccine efficacy rate being the most common reason cited to accept booster dose. Differences in acceptance rates were noted among those working in non-health related sectors, different ethnic groups as well as those who had taken viral vector vaccines. 相似文献
5.
6.
背景 致密性骨炎(OCI)和其他疾病有时难以鉴别,探讨血清骨转换生化标志物可为OCI的鉴别诊断提供依据。 目的 探索女性OCI患者的血清骨转换生化标志物的水平变化及临床意义。 方法 回顾性选取2013年6月至2022年2月在北京积水潭医院门诊及住院诊断为OCI的61例女性患者作为观察组,年龄15~50岁,平均(33.8±6.6)岁,病程2周~15年。选择同期61例女性体检健康者作为对照组,年龄15~48岁,平均(35.6±7.6)岁。比较两组一般临床资料和血清骨转换生化标志物水平,并对血清骨转换生化标志物与病情相关指标进行相关性分析。 结果 观察组血清白蛋白(45.4±2.9)g/L低于对照组(46.5±2.8)g/L(t=2.190,P<0.05)。血清骨转换生化标志物比较结果显示,观察组血清1型胶原羧基末端肽β特殊序列(β-CTX)〔0.28(0.23,0.37)μg/L〕、N-端骨钙素(OC)〔13.1(11.2,16.2)μg/L〕、25-羟维生素D3〔25-(OH)VD3〕〔(14.1±5.1)μg/L〕低于对照组〔0.36(0.29,0.48)μg/L,15.6(13.7,17.3)μg/L,(17.5±6.6)μg/L〕(Z=-2.983、-3.255,t=3.081,P<0.05)。长病程亚组OC水平〔14.6(12.4,18.5)μg/L〕高于短病程亚组〔11.7(10.2,14.0)μg/L〕(Z=-2.407,P<0.05)。多孕亚组β-CTX〔0.25(0.22,0.32)μg/L〕、OC水平〔12.2(10.3,15.0)μg/L〕低于非多孕亚组〔0.33(0.26,0.44)μg/L、13.4(12.0,18.8)μg/L〕(Z=-2.486、-1.897,P<0.05)。相关性分析显示,观察组血清1型前胶原氨基端延长肽(tP1NP)与妊娠次数、生产次数均呈负相关(rs=-0.276、-0.298,P<0.05),OC与体质指数(BMI)、视觉模拟评分法(VAS)评分、妊娠次数均呈负相关(rs=-0.284、-0.374、-0.360,P<0.05),25-(OH)VD3水平与BMI呈正相关(rs=0.275,P<0.05)。 结论 女性OCI患者血清OC、β-CTX水平明显降低,可为鉴别其他疾病提供依据;血清OC水平可以反映OCI患者的严重程度,同时OC水平与患者妊娠次数相关;tP1NP与妊娠次数、生产次数相关。 相似文献
7.
8.
《Archivos de bronconeumología》2022,58(3):246-254
We have updated recommendations on 12 controversial topics that were published in the 2013 National Consensus on the diagnosis, risk stratification and treatment of patients with pulmonary embolism (PE). A comprehensive review of the literature was performed for each topic, and each recommendation was evaluated in two teleconferences. For diagnosis, we recommend against using the Pulmonary Embolism Rule Out Criteria (PERC) rule as the only test to rule out PE, and we recommend using a D-dimer cutoff adjusted to age to rule out PE. We suggest using computed tomography pulmonary angiogram as the imaging test of choice for the majority of patients with suspected PE. We recommend using direct oral anticoagulants (over vitamin K antagonists) for the vast majority of patients with acute PE, and we suggest using anticoagulation for patients with isolated subsegmental PE. We recommend against inserting an inferior cava filter for the majority of patients with PE, and we recommend using full-dose systemic thrombolytic therapy for PE patients requiring reperfusion. The decision to stop anticoagulants at 3 months or to treat indefinitely mainly depends on the presence (or absence) and type of risk factor for venous thromboembolism, and we recommend against thrombophilia testing to decide duration of anticoagulation. Finally, we suggest against extensive screening for occult cancer in patients with PE. 相似文献
9.
10.