全文获取类型
收费全文 | 20180篇 |
免费 | 1195篇 |
国内免费 | 62篇 |
专业分类
耳鼻咽喉 | 305篇 |
儿科学 | 440篇 |
妇产科学 | 389篇 |
基础医学 | 2945篇 |
口腔科学 | 494篇 |
临床医学 | 2023篇 |
内科学 | 3746篇 |
皮肤病学 | 255篇 |
神经病学 | 2066篇 |
特种医学 | 1004篇 |
外国民族医学 | 1篇 |
外科学 | 3023篇 |
综合类 | 158篇 |
一般理论 | 11篇 |
预防医学 | 1433篇 |
眼科学 | 401篇 |
药学 | 1562篇 |
中国医学 | 71篇 |
肿瘤学 | 1110篇 |
出版年
2022年 | 123篇 |
2021年 | 296篇 |
2020年 | 195篇 |
2019年 | 277篇 |
2018年 | 318篇 |
2017年 | 310篇 |
2016年 | 337篇 |
2015年 | 437篇 |
2014年 | 576篇 |
2013年 | 832篇 |
2012年 | 1153篇 |
2011年 | 1235篇 |
2010年 | 694篇 |
2009年 | 672篇 |
2008年 | 1193篇 |
2007年 | 1327篇 |
2006年 | 1304篇 |
2005年 | 1323篇 |
2004年 | 1284篇 |
2003年 | 1233篇 |
2002年 | 1164篇 |
2001年 | 229篇 |
2000年 | 199篇 |
1999年 | 239篇 |
1998年 | 269篇 |
1997年 | 242篇 |
1996年 | 181篇 |
1995年 | 176篇 |
1994年 | 174篇 |
1993年 | 173篇 |
1992年 | 145篇 |
1991年 | 116篇 |
1990年 | 109篇 |
1989年 | 123篇 |
1988年 | 105篇 |
1987年 | 105篇 |
1986年 | 83篇 |
1985年 | 125篇 |
1984年 | 110篇 |
1983年 | 117篇 |
1982年 | 123篇 |
1981年 | 130篇 |
1980年 | 107篇 |
1979年 | 95篇 |
1978年 | 96篇 |
1977年 | 101篇 |
1976年 | 84篇 |
1975年 | 75篇 |
1973年 | 73篇 |
1970年 | 64篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
Sharisse M. Arnold Rehring Liza M. Reifler Jennifer H. Seidel Karen A. Glenn John F. Steiner 《Academic pediatrics》2019,19(5):572-580
ObjectiveClinical specialty societies recommend long-acting reversible contraceptives (LARCs) as first-line contraception for adolescent women. We evaluated whether a combined educational and process improvement intervention enhanced LARC placement in primary care within an integrated health care system.MethodsThe intervention included journal clubs, live continuing education, point-of-care guidelines, and new patient materials. We conducted a retrospective cohort study across 3 time periods: baseline (January 2013?September 2015), early implementation (October 2015–March 2016), and full implementation (April 2016–June 2017). The primary outcome was the proportion of LARCs placed by primary care clinicians among women aged 13 to 18 years compared with gynecology clinicians.ResultsKaiser Foundation Health Plan of Colorado cared for approximately 20,000 women aged 13 to 18 years in each calendar quarter between 2013 and 2017. Overall, LARC placement increased from 7.0 per 1000 members per quarter at baseline to 13.0 per 1000 during the full intervention. Primary care clinicians placed 6.2% of all LARCs in 2013, increasing to 32.1% by 2017 (P < .001), including 45.5% of contraceptive implants. Clinicians who attended educational sessions were more likely to adopt LARCs than those who did not (17.9% vs 6.4% respectively, P = .009). Neither overall LARC placement rates (relative risk, 1.9; 95% confidence interval, 0.7?5.6) nor contraceptive implant rates (relative risk, 3.0; 95% confidence interval, 0.9?9.8) increased significantly in clinicians who attended educational activities.ConclusionsThis multimodal intervention was associated with increased LARC placement for adolescent women in primary care. The combination of education and process improvement is a promising strategy to promote clinician behavior change. 相似文献
4.
5.
Susan C. Fox Jane A. May Natalia Dovlatova Jackie R. Glenn Andrew Johnson Ann E. White 《Platelets》2019,30(3):290-295
Measurement of P-selectin on activated platelets as a means of measuring platelet function utilizing the technology described here has the advantage of not requiring immediate access to specialist equipment and expertise. Blood samples are activated, fixed, stored, and transported to a central laboratory for flow cytometric analysis. Here we have compared P-selectin with other more traditional approaches to measuring platelet function in blood and/or platelet-rich plasma (PRP) from patients with acute coronary syndromes on treatment for at least 1 month with either aspirin and clopidogrel or aspirin with prasugrel. The comparators were light transmission aggregometry (LTA), VerifyNow and Multiplate aggregometry (for determining the effects of aspirin) and LTA, VerifyNow and Multiplate together with the BioCytex VASP phosphorylation assay (for the P2Y12 antagonists). The P-selectin Aspirin Test revealed substantial inhibition of platelet function in all but three of 96 patients receiving aspirin with clopidogrel and in none of 51 patients receiving aspirin and prasugrel. The results were very similar to those obtained using LTA. There was only one patient with high residual platelet aggregation and low P-selectin expression. The same patients identified as “non-responders” to aspirin also presented with the highest residual platelet activity as measured using the VerifyNow system, although not quite as well separated from the other values. With the Multiplate test only one of these patients clearly stood out from the others. The results obtained using the P-selectin P2Y12 Test in 102 patients taking aspirin and clopidogrel were similar to the more traditional approaches in that a wide scatter of results was obtained. Generally, high values seen with the P-selectin P2Y12 Test were also high with the LTA, VerifyNow, Multiplate, and BioCytex VASP P2Y12 Tests. Similarly, low residual platelet function using the P2Y12 test was seen irrespective of the testing procedure used. However, there were differences in some patients. Prasugrel was always more effective than clopidogrel in inhibiting platelet function with none of 56 patients (P-selectin and VerifyNow), only 2 of 56 patients (Multiplate) and only 3 of 56 patients (Biocytex VASP) demonstrating high on-treatment residual platelet reactivity (HRPR) defined using previously published cut-off values. The exception was LTA where there were 11 of 56 patients with HRPR. It remains to be seen which experimental approach provides the most useful information regarding outcomes after adjusting therapies in treated patients. 相似文献
6.
7.
Christer Lunde Gjerstad Hans Jakob Bøe Erik Falkum Egil Wilhelm Martinsen Andreas Espetvedt Nordstrand Arnfinn Tønnesen Jon Gerhard Reichelt June Ullevoldsæter Lystad 《Journal of traumatic stress》2020,33(5):762-772
Peacekeeping missions involve experiences that may impact the mental health of participating soldiers. However, research on the long-term mental health consequences of peacekeeping is sparse. The present study aimed to find the prevalence of mental health problems (MHPs), possible MHP predictors, and associations between predictors and MHPs in Norwegian peacekeepers 18–38 years after deployment to a United Nations peacekeeping mission. We used data from a cross-sectional, postdeployment survey of Norwegian peacekeepers who served in Lebanon between 1978 and 1998 (N = 10,605). Participants were assessed for posttraumatic stress disorder (PTSD); anxiety; depression; insomnia; alcohol misuse; drug misuse; and exposure to pre-, peri-, and postdeployment stressors. Logistic regressions were executed to explore key variables associated with MHPs. Total MHP prevalence was 15.1%, 95% CI [14.4, 15.8]. The estimates for specific disorders were 0.1% for drug misuse, 3.4% for alcohol misuse, 4.0% for depression, 6.2% for PTSD, 6.4% for anxiety, and 9.3% for insomnia. Postdeployment stressors, OR = 1.91, 95% CI [1.79, 2.04]; employment status, OR = 1.41, 95% CI [1.33, 1.48]; and traumatic exposure during deployment, OR = 1.11, 95% CI [1.09, 1.12], were positively related to PTSD, χ2(17, N = 8,568) = 1,791.299, p < .001. Similar patterns were found for the other MHPs. Considering that most participants (84.9%) reported low symptom levels, our findings challenge the widespread public perception that most peacekeepers have MHPs. Moreover, our results indicate that future peacekeepers should be prepared for challenges they may face not only during deployment but also in the years following their homecoming. 相似文献
8.
This study charts pathways through message resistance to enhance the persuasiveness of diabetes self-care messages. A 2 (narrative) × 2 (other-referencing) × 2 (message) × 4 (order) experiment with adult diabetics (N = 58) tested whether packaging overt recommendations as a story rather than an informational argument (i.e., narrative structure) and highlighting the impact of health decisions on family and friends rather than the individual (i.e., other-referencing) can effectively attenuate psychological reactance to messages encouraging healthy diet and physical activity. Narrative and other-referencing each led to lower perceived threat to choice, less state anger and counterarguing, less negative cognitive responses, more positive attitudes toward the ad and the behaviors promoted, and greater intended compliance with message recommendations. Findings illustrate two strategies that communicators may employ in order to benefit from clear, direct health messages while avoiding the reactance they may provoke. Moreover, findings inform message design for diabetes self-care education. 相似文献
9.
10.
Jean-Sébastien Fallu Jürgen Rehm Emmanuel N. Kuntsche Esther Grichting Neerav Monga Edward M. Adlaf Susan J Bondy Gerhard Gmel 《Sozial- und Pr?ventivmedizin》2006,8(1):363-372
Volume and profile of alcohol consumption among students and classmates as predictors of aggression and victimization: a multilevel
analysis among Swiss adolescents