全文获取类型
收费全文 | 64574篇 |
免费 | 3037篇 |
国内免费 | 1482篇 |
专业分类
耳鼻咽喉 | 68篇 |
儿科学 | 990篇 |
妇产科学 | 253篇 |
基础医学 | 3037篇 |
口腔科学 | 77篇 |
临床医学 | 9400篇 |
内科学 | 14761篇 |
皮肤病学 | 76篇 |
神经病学 | 9480篇 |
特种医学 | 3039篇 |
外科学 | 2492篇 |
综合类 | 13287篇 |
预防医学 | 2216篇 |
眼科学 | 78篇 |
药学 | 6345篇 |
79篇 | |
中国医学 | 3300篇 |
肿瘤学 | 115篇 |
出版年
2024年 | 34篇 |
2023年 | 546篇 |
2022年 | 1155篇 |
2021年 | 1822篇 |
2020年 | 1828篇 |
2019年 | 1296篇 |
2018年 | 1277篇 |
2017年 | 1614篇 |
2016年 | 1866篇 |
2015年 | 1845篇 |
2014年 | 4306篇 |
2013年 | 4118篇 |
2012年 | 4043篇 |
2011年 | 4263篇 |
2010年 | 3579篇 |
2009年 | 3403篇 |
2008年 | 3480篇 |
2007年 | 3495篇 |
2006年 | 3353篇 |
2005年 | 2830篇 |
2004年 | 2322篇 |
2003年 | 1992篇 |
2002年 | 1872篇 |
2001年 | 1736篇 |
2000年 | 1504篇 |
1999年 | 1327篇 |
1998年 | 999篇 |
1997年 | 952篇 |
1996年 | 727篇 |
1995年 | 649篇 |
1994年 | 595篇 |
1993年 | 507篇 |
1992年 | 462篇 |
1991年 | 409篇 |
1990年 | 355篇 |
1989年 | 294篇 |
1988年 | 286篇 |
1987年 | 288篇 |
1986年 | 211篇 |
1985年 | 291篇 |
1984年 | 207篇 |
1983年 | 133篇 |
1982年 | 148篇 |
1981年 | 109篇 |
1980年 | 111篇 |
1979年 | 85篇 |
1978年 | 82篇 |
1977年 | 69篇 |
1976年 | 56篇 |
1973年 | 34篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
《Journal of vascular and interventional radiology : JVIR》2022,33(3):249-254.e1
An ovine iliac vein thrombosis model was devised to test a wall-contacting rotational thrombectomy device. Thrombosis was successfully induced in 9 sheep with an average clot length of 31 mm ± 12 and >60% vessel occlusion on angiography. The thrombus was subsequently removed, maintaining normal intraoperative pulmonary arterial pressure (5.9 mm Hg ± 3.6) and complete distal reperfusion after thrombectomy. Additionally, the sheep were without signs of vascular trauma or embolic complications on gross necropsy and histopathologic analysis. The findings from this study support the use of an ovine iliac deep vein thrombosis model for testing of a lower extremity thrombectomy device. 相似文献
4.
《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
5.
6.
7.
8.
《Gait & posture》2022
BackgroundThe Fullerton Advanced Balance Scale (FAB) is a multi-item balance assessment test designed to measure balance in relatively higher functioning individuals. The aim of this study was to examine the reliability and validity of the Turkish version of the FAB (FAB-T) in children with cerebral palsy (CP).Research questionIs the Turkish version of the Fullerton Advance Balance Scale valid and reliable in determining balance problems in children with cerebral palsy and determining the underlying cause of this condition?MethodsForty-six children with CP participated in this study. Rasch analysis was used to investigate item adherence. Internal consistency of the FAB-T was established using Cronbach's alpha coefficient. Test-retest reliability was also evaluated. In addition, to assess concurrent validity, FAB-T scores were compared with the Pediatric Balance Scale (PBS) using the Spearman correlation coefficient.ResultsThe FAB-T showed satisfactory internal consistency (Cronbach's alpha value=0.94) and excellent test-retest reliability (ICC=0.99). The FAB and the PBS exhibited concurrent positive validity (r = 0.913; p < 0.001). All items of the FAB-T were found to fit the Rasch Model (Chi-square 16.01(df=20), p = 0.716).SignificanceThe FAB-T is a reliable and valid tool that can be used to measure balance skills and to identify the source of the problem in children with CP. 相似文献
9.
10.
Ludefu Su Yu Liu Yanhong Tang Mingmin Zhou Liang Xiong Congxin Huang 《International journal of clinical and experimental pathology》2021,14(4):408
Background and objective: Myocardial infarction (MI) is a common critical disease of the cardiovascular system. The process of MI is often accompanied by the excessive activation of cardiac sympathetic nerves, which leads to arrhythmia. Resiniferatoxin (RTX) is a transient receptor potential vanilloid 1 (TRPV1), involved in the cardiac sympathetic afferent reflex. However, whether RTX can reduce the occurrence of arrhythmia and exert a cardioprotective effect by inhibiting the sympathetic reflex during MI is still unknown. Methods: The left anterior descending artery of cardiac was clamped to construct a model of MI. RTX (50 μg/ml) was used by epicardial application in MI rats. Ventricular electrophysiologic properties were continuously monitored by a body surface ECG. Yrosine hydroxylase (TH) and growth associated protein 43 (GAP43) were detected by Immunofluorescence staining. Connexin43 and transforming growth factor beta receptor 1 (TGF-β1) were detected by western blot. Norepinephrine (NE) and BNP levels in blood and tissue were determined by ELISA. Cardiac function was assessed by echocardiography. Results: The ERP, APD90, QRS, QT and the Tend-Tpeak intervals in MI rats were all prolonged, but decreased after RTX treatment (n = 3, P<0.05). In contrast, the RR interval was shortened in the MI group, but prolonged in the MI+RTX group (n = 3, P<0.05). RTX treatment significantly reduced ventricular arrhythmias after MI. TH- and GAP43-positive nerve densities and TGF-β1, and cx-43 protein expression were up-regulated in the MI group compared to the sham group, and they were decreased in the MI+RTX group compared to the MI group (n = 3, P<0.05). RTX can decrease serum and tissue NE and BNP levels (n = 3, P<0.05). RTX pretreatment significantly decreased heart rate, HW/BW ratio and LVIDS, and increased LVEF andLVFS values (n = 3, P<0.05). Conclusion: RTX improved cardiac dysfunction, ventricular electrophysiologic properties, and sympathetic nerve remodeling in rats with MI by inhibiting the excessive cardiac sympathetic drive. 相似文献