全文获取类型
收费全文 | 6924篇 |
免费 | 390篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 10篇 |
儿科学 | 272篇 |
妇产科学 | 182篇 |
基础医学 | 468篇 |
口腔科学 | 34篇 |
临床医学 | 663篇 |
内科学 | 1487篇 |
皮肤病学 | 72篇 |
神经病学 | 779篇 |
特种医学 | 186篇 |
外科学 | 499篇 |
综合类 | 59篇 |
现状与发展 | 1篇 |
预防医学 | 1452篇 |
眼科学 | 83篇 |
药学 | 443篇 |
中国医学 | 3篇 |
肿瘤学 | 622篇 |
出版年
2023年 | 466篇 |
2022年 | 655篇 |
2021年 | 556篇 |
2020年 | 608篇 |
2019年 | 356篇 |
2018年 | 300篇 |
2017年 | 348篇 |
2016年 | 367篇 |
2015年 | 289篇 |
2014年 | 510篇 |
2013年 | 422篇 |
2012年 | 248篇 |
2011年 | 183篇 |
2010年 | 272篇 |
2009年 | 246篇 |
2008年 | 143篇 |
2007年 | 148篇 |
2006年 | 143篇 |
2005年 | 115篇 |
2004年 | 101篇 |
2003年 | 95篇 |
2002年 | 111篇 |
2001年 | 99篇 |
2000年 | 79篇 |
1999年 | 47篇 |
1998年 | 57篇 |
1997年 | 42篇 |
1996年 | 34篇 |
1995年 | 12篇 |
1994年 | 6篇 |
1993年 | 8篇 |
1992年 | 38篇 |
1991年 | 22篇 |
1990年 | 21篇 |
1989年 | 15篇 |
1988年 | 24篇 |
1987年 | 7篇 |
1985年 | 9篇 |
1984年 | 9篇 |
1983年 | 9篇 |
1982年 | 5篇 |
1981年 | 10篇 |
1980年 | 10篇 |
1979年 | 6篇 |
1978年 | 7篇 |
1976年 | 6篇 |
1974年 | 4篇 |
1973年 | 7篇 |
1972年 | 4篇 |
1965年 | 4篇 |
排序方式: 共有7315条查询结果,搜索用时 847 毫秒
1.
2.
3.
4.
《Ticks and Tick》2022,13(3):101934
Anaplasmosis is a tick-transmitted disease due to several species of the genus Anaplasma. In 2019, we demonstrated the presence of Anaplasma capra in two deer species at a zoological park in mainland France. As we suspected its presence in Corsica, we surveyed 11 geographically distant sheep or goat farms. Using molecular tools such as nested PCR targeting 16S ribosomal RNA (rRNA), citrate synthase (gltA) and heat-shock protein (groEL) genes, we detected the presence of A. capra on 5/11 farms, in 26/108 blood samples (24%), in sheep as well as in goats. Genotyping and phylogenetic analysis of A. capra revealed that isolates from Corsica island grouped closely with A. capra isolates reported in red deer and swamp deer from a zoological reserve in mainland France, as well as in roe deer from Spain, in a separate and well supported clade within A. capra clade II. This third report of the tick-borne bacterium A. capra in Europe suggests a potentially larger presence of this pathogen on the European continent, on domestic, native as well as wild ruminants, a broad host range already described in Asian countries for this species. 相似文献
5.
6.
《Journal of cardiac failure》2022,28(9):1469-1474
BackgroundThe role of blood volume (BV) expansion vs a change in vascular compliance in worsening heart failure (HF) remains under debate. We aimed to assess the relationship between BV and resting and stress hemodynamics in worsening HF and to further elucidate the significance of BV in cardiac decompensation.Methods and ResultsPatients with worsening HF underwent radiolabeled indicator-dilution BV analysis and cardiac catheterization. Intravascular volumes and resting/stress hemodynamics were recorded. Provocative stress maneuvers included change in systolic blood pressure (ΔSBP) from lying to standing and Valsalva and intracardiac pressure changes with leg raise. Correlation between BV and invasive hemodynamics were assessed by linear regression. Of 27 patients with worsening HF, patients’ characteristics included mean age 61 ± 12 years, 70% male, 19% Black, and mean ejection fraction 29% ± 15%. Of the patients, 13 (48%) had hypervolemia as measured by total BV, which weakly correlated with ΔSBP by position (R2 = 0.009) and Valsalva (R2 = 0.003) and with right atrial (R2 = 0.049) and pulmonary capillary wedge (R2 = 0.047) pressure changes during leg raise.ConclusionsIn patients with worsening HF, BV mildly correlated with intracardiac pressures at rest. Provocative maneuvers intended to test vascular compliance did not correlate with BV, indicating that compliance may serve as a stand-alone metric in HF. 相似文献
7.
8.
9.
10.
《The American journal of geriatric psychiatry》2022,30(8):878-882
ObjectiveFew support services and caregiving interventions exist to support family caregivers in low- and middle-income countries (LMIC). This paper presents exploratory analyses of outcomes of Resources for Enhancing Alzheimer's Caregiver Health in Vietnam (REACH VN).MethodsA cluster randomized controlled trial (RCT) was conducted in Soc Son, a semi-rural area in Hanoi. Nine clusters with 60 caregivers were randomized to either an enhanced control group or REACH VN, an in-home, multicomponent, family caregiver support intervention delivered over two to three months. Outcomes were assessed at baseline and three months.ResultsCaregivers in the intervention group experienced a significantly greater reduction in frustration levels compared to those in the control group. There were differences in other outcomes (e.g., care recipient problem behaviors and associated caregiver bother) favoring the intervention condition that did not reach statistical significance.ConclusionWe found additional evidence that REACH VN is a promising intervention to improve family caregiver outcomes in Vietnam. 相似文献