全文获取类型
收费全文 | 52831篇 |
免费 | 4347篇 |
国内免费 | 2248篇 |
专业分类
耳鼻咽喉 | 425篇 |
儿科学 | 600篇 |
妇产科学 | 532篇 |
基础医学 | 8619篇 |
口腔科学 | 1012篇 |
临床医学 | 5146篇 |
内科学 | 8113篇 |
皮肤病学 | 551篇 |
神经病学 | 5195篇 |
特种医学 | 2449篇 |
外国民族医学 | 12篇 |
外科学 | 6671篇 |
综合类 | 7825篇 |
现状与发展 | 9篇 |
预防医学 | 1521篇 |
眼科学 | 1864篇 |
药学 | 5047篇 |
13篇 | |
中国医学 | 2231篇 |
肿瘤学 | 1591篇 |
出版年
2024年 | 124篇 |
2023年 | 722篇 |
2022年 | 1213篇 |
2021年 | 1813篇 |
2020年 | 1756篇 |
2019年 | 1621篇 |
2018年 | 1624篇 |
2017年 | 1544篇 |
2016年 | 1570篇 |
2015年 | 1720篇 |
2014年 | 2914篇 |
2013年 | 3382篇 |
2012年 | 2680篇 |
2011年 | 2986篇 |
2010年 | 2611篇 |
2009年 | 2521篇 |
2008年 | 2593篇 |
2007年 | 2711篇 |
2006年 | 2550篇 |
2005年 | 2269篇 |
2004年 | 2012篇 |
2003年 | 1851篇 |
2002年 | 1572篇 |
2001年 | 1317篇 |
2000年 | 1145篇 |
1999年 | 967篇 |
1998年 | 948篇 |
1997年 | 900篇 |
1996年 | 830篇 |
1995年 | 720篇 |
1994年 | 631篇 |
1993年 | 554篇 |
1992年 | 542篇 |
1991年 | 532篇 |
1990年 | 418篇 |
1989年 | 388篇 |
1988年 | 343篇 |
1987年 | 321篇 |
1986年 | 254篇 |
1985年 | 346篇 |
1984年 | 291篇 |
1983年 | 176篇 |
1982年 | 259篇 |
1981年 | 258篇 |
1980年 | 179篇 |
1979年 | 166篇 |
1978年 | 152篇 |
1977年 | 131篇 |
1976年 | 119篇 |
1975年 | 54篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
Phoebe Hammer Kevin White Stephanie Mengden Vessy Korcheva Philipp W. Raess 《Journal of cutaneous pathology》2019,46(5):343-346
Cutaneous leiomyomas are rare benign smooth‐muscle tumors. These lesions are distinguished based on their cell of origin and are subclassified as pilar leiomyoma, angioleiomyoma, and genital‐type leiomyoma. Nipple leiomyoma is the least common genital‐type leiomyoma, arising from the dartoic muscle cell of the nipple. Histologic examination of the lesion is necessary for definitive diagnosis, and these uncommon tumors can pose a diagnostic challenge. We describe herein a series of six nipple leiomyomas with a spectrum of histologic appearances. 相似文献
4.
目的探究面肌痉挛患者微血管减压术(MVD)中异常肌反应(AMR)的变化特点与术后疗效的关系。方法回顾性分析73例MVD术中采用AMR全程定量化监测患者的AMR变化特点,减压操作前AMR阈值较基础阈值升高≥1倍为A1组、1倍为A2组,手术结束时AMR完全消失为B1组、未消失为B2组,B2组中AMR阈值较基础阈值升高≥1倍为B2a组、1倍为B2b组,对各组的术后疗效进行对比分析。结果 A1组21例中,19例立即治愈,1例延迟治愈,1例未愈; A2组52例中,35例立即治愈,9例延迟治愈,8例未愈。A1组较A2组疗效好(P=0. 046)。B1组50例中,42例立即治愈,5例延迟治愈,3例未愈; B2组23例中,12例立即治愈,5例延迟治愈,6例未愈。B1组较B2组疗效好(P=0. 003)。B2 a组的治愈比例较B2 b组高(分别为14/16、3/7),差异有统计学意义(P=0. 045)。结论 AMR在术中的变化特点对术者有重要参考意义,AMR在减压前升高、在手术结束时完全消失、未消失但升高较基础阈值≥1倍者术后疗效相对较好。 相似文献
5.
6.
Wojciech Szychta M.D. Ph.D. Gheorghe Cerin M.D. Ph.D. F.E.S.C. Bogdan Adrian Popa M.D. Armienti Felice M.D. Guido Lanzillo M.D. Ph.D. Marco Diena M.D. Grzegorz Opolski M.D. Ph.D. F.E.S.C. 《Echocardiography (Mount Kisco, N.Y.)》2015,32(6):1040-1043
Sinus venosus atrial septal defect (SV‐ASD) usually coexists with partial anomalous pulmonary vein connection (PAPVC). It is a difficult diagnosis in transthoracic echocardiography (TTE) due to eccentric position of defects. We present a rare case of atypical anatomical variation in PAPVC, which was never described before. Two right pulmonary veins drained into superior vena cava, which overrode SV‐ASD and interatrial septum, a third pulmonary vein into the right atrium. Complete diagnosis could not be set after TTE, nor transesophageal echocardiography, whereas angio‐CT was finally conclusive. This diagnostic approach allowed the surgical planning. 相似文献
7.
8.
《Clinical neurophysiology》2020,131(1):259-264
ObjectivesFasciculation potentials (FP) are an important consideration in the electrophysiological diagnosis of ALS. Muscle ultrasonography (MUS) has a higher sensitivity in detecting fasciculations than electromyography (EMG), while in some cases, it is unable to detect EMG-detected fasciculations. We aimed to investigate the differences of FP between the muscles with and without MUS-detected fasciculations (MUS-fas).MethodsThirty-one consecutive patients with sporadic ALS were prospectively recruited and in those, both needle EMG and MUS were performed. Analyses of the amplitude, duration, and number of phases of EMG-detected FPs were performed for seven muscles per patient, and results were compared between the muscles with and without MUS-fas in the total cohort.ResultsThe mean amplitude and phase number of FP were significantly lower in patients with EMG-detected FP alone (0.39 ± 0.25 mV and 3.21 ± 0.88, respectively) than in those with both FP and MUS-fas (1.22 ± 0.92 mV and 3.74 ± 1.39, respectively; p < 0.0001 and p = 0.017, Welch’s t-test).ConclusionSmall FP may be undetectable with MUS. MUS cannot replace EMG in the diagnostic approach for ALS.SignificanceClinicians should use a combination of EMG and MUS for the detection and quantitative analysis of fasciculation in ALS. 相似文献
9.
《Archives of Cardiovascular Diseases》2022,115(10):505-513
Central illustration: cumulative major adverse cardiac events (MACE) and bioresorbable vascular scaffold (BVS) thrombosis rates after 1, 2, 3, 4 and 5 years. 相似文献
10.