全文获取类型
收费全文 | 45918篇 |
免费 | 4085篇 |
国内免费 | 2050篇 |
专业分类
耳鼻咽喉 | 102篇 |
儿科学 | 957篇 |
妇产科学 | 138篇 |
基础医学 | 3371篇 |
口腔科学 | 353篇 |
临床医学 | 5432篇 |
内科学 | 17551篇 |
皮肤病学 | 179篇 |
神经病学 | 340篇 |
特种医学 | 2015篇 |
外科学 | 2648篇 |
综合类 | 9291篇 |
现状与发展 | 4篇 |
预防医学 | 1437篇 |
眼科学 | 147篇 |
药学 | 4744篇 |
28篇 | |
中国医学 | 2991篇 |
肿瘤学 | 325篇 |
出版年
2024年 | 53篇 |
2023年 | 726篇 |
2022年 | 1037篇 |
2021年 | 1708篇 |
2020年 | 1860篇 |
2019年 | 1668篇 |
2018年 | 1663篇 |
2017年 | 1606篇 |
2016年 | 1541篇 |
2015年 | 1616篇 |
2014年 | 2856篇 |
2013年 | 3198篇 |
2012年 | 2524篇 |
2011年 | 2850篇 |
2010年 | 2352篇 |
2009年 | 2250篇 |
2008年 | 2379篇 |
2007年 | 2459篇 |
2006年 | 2306篇 |
2005年 | 1948篇 |
2004年 | 1605篇 |
2003年 | 1372篇 |
2002年 | 1218篇 |
2001年 | 1227篇 |
2000年 | 969篇 |
1999年 | 841篇 |
1998年 | 745篇 |
1997年 | 667篇 |
1996年 | 535篇 |
1995年 | 517篇 |
1994年 | 515篇 |
1993年 | 401篇 |
1992年 | 334篇 |
1991年 | 309篇 |
1990年 | 281篇 |
1989年 | 205篇 |
1988年 | 226篇 |
1987年 | 220篇 |
1986年 | 187篇 |
1985年 | 215篇 |
1984年 | 189篇 |
1983年 | 102篇 |
1982年 | 140篇 |
1981年 | 111篇 |
1980年 | 78篇 |
1979年 | 57篇 |
1978年 | 49篇 |
1977年 | 44篇 |
1976年 | 30篇 |
1974年 | 22篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
《The Journal for Nurse Practitioners》2022,18(2):245-247
Transient stress hyperglycemia in the setting of acute myocardial infarction is a frequent phenomenon. Its transient nature should not dissuade the clinician from management of elevated blood glucose in a patient after an ST-elevation myocardial infarction. This case presents an adult patient after an ST-elevation myocardial infarction with transient stress hyperglycemia and the evidence used to identify optimal pharmacologic management and secondary prevention. 相似文献
3.
《Journal of Cardiovascular Computed Tomography》2022,16(6):483-490
BackgroundInflammation surrounding the coronary arteries can be non-invasively assessed using pericoronary adipose tissue attenuation (PCAT). While PCAT holds promise for further risk stratification of patients with low coronary artery disease (CAD) prevalence, its value in higher risk populations remains unknown.MethodsCORE320 enrolled patients referred for invasive coronary angiography with known or suspected CAD. Coronary computed tomography angiography (CCTA) images were collected for 381 patients for whom clinical outcomes were assessed 5 years after enrollment. Using semi-automated image analysis software, PCAT was obtained and normalized for the right coronary (RCA), left anterior descending (LAD), and left circumflex arteries (LCx). The association between PCAT and major adverse cardiovascular events (MACE) during follow up was assessed using Cox regression models.ResultsThirty-seven patients were excluded due to technical failure. For the remaining 344 patients, median age was 62 (interquartile range, 55–68) with 59% having ≥1 coronary artery stenosis of ≥50% by quantitative coronary angiography. Mean attenuation values for PCAT in RCA, LAD, and LCx were ?74.9, ?74.2, and ?71.2, respectively. Hazard ratios and 95% confidence intervals (CI) for normalized PCAT in the RCA, LAD, and LCx for MACE were 0.96 (CI: 0.75–1.22, p ?= ?0.71), 1.31 (95% CI: 0.96–1.78, p ?= ?0.09), and 0.98 (95% CI: 0.78–1.22, p ?= ?0.84), respectively. For death, stroke, or myocardial infarction only, hazard ratios were 0.68 (0.44–1.07), 0.85 (0.56–1.29), and 0.57 (0.41–0.80), respectively.ConclusionsIn patients referred for invasive coronary angiography with suspected CAD, PCAT did not predict MACE during long term follow up. Further studies are needed to understand the relationship of PCAT with CAD risk. 相似文献
4.
5.
目的 通过分析特发性肺纤维化急性加重期(AE-IPF)患者证候与血清生物标志物的关系,为中医辨证治疗提供参考。方法 采用观察性研究设计,收集2019年3月至2019年11月三个中心的AE-IPF患者76例,其中痰热壅肺证26例、痰浊阻肺证50例,并纳入健康志愿者10例作为对照。采用ELISA测定患者血清CCL18、HMGB1、KL-6、MMP-7、SP-A和SP-D水平,分析与中医证候的相关性。结果 AE-IPF患者血清CCL18、HMGB1、KL-6、MMP-7、SP-A和SP-D水平均显著高于健康对照组。血清CCL18、HMGB1、KL-6、MMP-7和SP-D水平在痰热壅肺证和痰浊阻肺证患者间无显著性差异(P>0.05),而血清SP-A水平存在显著性差异(P<0.05)。结论 血清SP-A与AE-IPF证候存在一定的相关性,血清SP-A的浓度升高,与痰热壅肺证关系越密切,反之,血清SP-A浓度降低,则与痰浊阻肺证关系越密切。AE-IPF痰热壅肺证患者的预后可能较痰浊阻肺证患者更差。 相似文献
6.
Efficacy of Curcumin in Combination with Intralesional Dexamethasone with Hyaluronidase in the Treatment of Oral Submucous Fibrosis: A Randomized Controlled Trial 下载免费PDF全文
Sagar AdhikariJyotsna RimalIccha Kumar MaharjanAshish Shrestha 《Asian Pacific journal of cancer prevention》2022,23(9):3125-3132
Objective: The objective of this study was to determine the efficacy of curcumin in combination with intralesional dexamethasone with hyaluronidase in the treatment of oral submucous fibrosis (OSF). Methods: This randomized, double blind, parallel design, clinical trial was conducted at B.P. Koirala Institute of Health Sciences, Nepal. Thirty-four patients with clinically diagnosed OSF were randomized into two groups (17 participants in each) with baseline treatment of intralesional dexamethasone with hyaluronidase for 6 weeks for the both. Curcumin (2gm/day) was provided to Group A (Test) and Group B (Control) received placebo. Interincisal mouth opening, tongue protrusion, cheek flexibility and visual analogue scale (VAS) scoring of burning sensation of oral mucosa was recorded at baseline, 6, 8 and 12 weeks follow-up and independent t-test was used to compare the improvements in two groups. Results: On comparing the 6 weeks and baseline values, in Group A and B the mean difference in mouth opening was 8.82±1.33 mm and 5.53±1.17 mm respectively (p<0.001), in cheek flexibility was 2.94±1.02 mm and 1.94±1.24 mm respectively (p=0.02) and in tongue protrusion was 6.23±1.48 and 3.65±1.37 mm respectively (p<0.001). The findings were consistent in the 8 weeks follow-up. In 12 weeks follow-up, on comparing with the baseline values, in Group A and B, the mean difference in mouth opening was 8.71±1.16 mm and 5.35±1.22 mm respectively (<0.001), ), in cheek flexibility was 2.81±1.01 mm and 1.76±1.35 mm respectively (p=0.02) and in tongue protrusion was 6.06±1.48 and 3.35±1.50 mm respectively (p<0.001). Both the arms showed 100% improvement in burning sensation in 6, 8 and 12 weeks follow-up. Conclusion: Curcumin in combination with intralesional dexamethasone with hyaluronidase is efficacious in the treatment of OSF. 相似文献
7.
《The Journal for Nurse Practitioners》2022,18(1):31-35
Acute coronary syndrome (ACS) remains one of the leading causes of death in the United States. With its heightened prevalence, considerable variabilities in the disease process exist across ethnicities, sex, and age. This creates substantial disparities in the recognition and management of ACS, which consequently contributes to poor outcomes. It is of utmost importance that nurse practitioners remain vigilant, cognizant, and maintain a high index of suspicion to accurately identify ACS presentations and thus efficaciously intervene to successfully manage the disease process. 相似文献
8.
目的 对中医药治疗特发性肺纤维化(idiopathic pulmonary fibrosis, IPF)的系统评价(SRs)进行再评价。方法 检索知网、中国生物医学数据库、维普、万方、The Cochrane Library、Web of Science、PubMed和EMbase数据库,纳入中医药治疗IPF的SRs,截止2021年5月。使用AMSTAR 2量表进行方法学质量评价,GRADE系统工具进行结局指标证据质量分级。结果 共纳入28篇文献,试验组除辨证论治外,治疗方法集中在活血化瘀、补肺益气等方面,基本符合治疗法则。结果显示中医药治疗IPF可以提高有效率、增加肺功能、提高PaO2、增加6WMD、缓解临床症状、提高患者的生活质量等。AMSTAR 2量表评价,所纳入SRs均有多项关键条目不达标,整体方法学质量等级不高。采用GRADE工具进行质量分级,一共234个结局指标,无高等证据质量,整体证据等级不高。结论 中医药对比西医治疗IPF有效且不良反应不明显,但RCT研究和系统评价研究方法质量尚有缺陷,完全按照西医评价指标可能会低估真实结果,未来需要更规范的研究及适合中医的评价指标,对中医药研究的安全性方面关注还有待提高。 相似文献
9.
10.
目的探讨认知重构干预对急性心肌梗死(AMI)介入手术患者不良情绪及疾病感知的影响。方法72例AMI介入手术患者随机分为两组各36例,对照组给予常规护理干预,研究组在对照组基础上给予认知重构干预,比较两组的不良情绪、疾病感知以及治疗依从性。结果干预后,研究组的HAMA、HAMD评分均低于对照组,疾病感知各项评分均高于对照组(P<0.05)。研究组的治疗依从性为94.44%,高于对照组的75.00%(P<0.05)。结论认知重构干预对急性心肌梗死介入手术患者的不良情绪及疾病感知均有积极的影响,可提升患者的治疗依从性。 相似文献