全文获取类型
收费全文 | 20621篇 |
免费 | 1550篇 |
国内免费 | 401篇 |
专业分类
耳鼻咽喉 | 107篇 |
儿科学 | 617篇 |
妇产科学 | 511篇 |
基础医学 | 2863篇 |
口腔科学 | 343篇 |
临床医学 | 2166篇 |
内科学 | 4065篇 |
皮肤病学 | 427篇 |
神经病学 | 1858篇 |
特种医学 | 587篇 |
外国民族医学 | 3篇 |
外科学 | 2122篇 |
综合类 | 927篇 |
现状与发展 | 1篇 |
一般理论 | 18篇 |
预防医学 | 1484篇 |
眼科学 | 431篇 |
药学 | 1687篇 |
5篇 | |
中国医学 | 316篇 |
肿瘤学 | 2034篇 |
出版年
2024年 | 31篇 |
2023年 | 249篇 |
2022年 | 278篇 |
2021年 | 858篇 |
2020年 | 589篇 |
2019年 | 689篇 |
2018年 | 736篇 |
2017年 | 588篇 |
2016年 | 547篇 |
2015年 | 796篇 |
2014年 | 991篇 |
2013年 | 1119篇 |
2012年 | 1766篇 |
2011年 | 1697篇 |
2010年 | 990篇 |
2009年 | 799篇 |
2008年 | 1274篇 |
2007年 | 1282篇 |
2006年 | 1263篇 |
2005年 | 1226篇 |
2004年 | 1008篇 |
2003年 | 945篇 |
2002年 | 757篇 |
2001年 | 179篇 |
2000年 | 181篇 |
1999年 | 211篇 |
1998年 | 168篇 |
1997年 | 149篇 |
1996年 | 137篇 |
1995年 | 111篇 |
1994年 | 109篇 |
1993年 | 82篇 |
1992年 | 98篇 |
1991年 | 90篇 |
1990年 | 57篇 |
1989年 | 63篇 |
1988年 | 49篇 |
1987年 | 51篇 |
1986年 | 32篇 |
1985年 | 42篇 |
1984年 | 41篇 |
1983年 | 23篇 |
1982年 | 26篇 |
1981年 | 17篇 |
1980年 | 18篇 |
1979年 | 20篇 |
1978年 | 25篇 |
1977年 | 12篇 |
1973年 | 15篇 |
1972年 | 13篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Zongzhang Huang Qigu Yao Jianping Zhu Ying He Yanghao Chen Feng Wu Teng Hua 《Diagnostic and interventional imaging》2021,102(5):279-285
PurposeThe purpose of this study was to make a systematic review and meta-analysis to determine the stent diameter (8 mm vs. 10 mm) that conveys better safety and clinical efficacy for transjugular intrahepatic portosystemic shunt (TIPS).Materials and methodsFour databases were used to identify clinical trials published from inception until March 2020. Data were extracted to estimate and compare one-year and three-year overall survivals, hepatic encephalopathy, variceal rebleeding, and shunt dysfunction rates between patients with 8 mm covered stents and those with 10 mm covered stents.ResultsFive eligible studies were selected, which included 489 patients (316 men, 173 women). The 8 mm covered stent group had higher efficacy regarding one-year or three-year overall survival (odds ratio [OR], 2.88; P = 0.003) and (OR, 1.81; P = 0.04) and lower hepatic encephalopathy (OR, 0.69; P = 0.04) compared with 10 mm covered stent group. There were no significant differences in variceal rebleeding rate (OR 0.80; P = 0.67). However, shunt dysfunction was lower in 10 mm covered stent group (OR, 2.26; P = 0.003).ConclusionsOur results suggest that the use of 8 mm covered stents should be preferred to that of 10 mm covered stents for TIPS placement when portal pressure is frequently monitored. 相似文献
2.
3.
BackgroundLittle is known about the extent of ordering low-value services by.PurposeTo compare the rates of low-value back images ordered by primary care physicians (PCMDs) and primary care nurse practitioners (PCNPs).MethodWe used 2012 and 2013 Medicare Part B claims for all beneficiaries in 18 hospital referral ?regions (HRRs) and a measure of low-value back imaging from Choosing Wisely. Models included random clinician effect and fixed effects for beneficiary age, disability, Elixhauser comorbidities, clinician sex, the emergency department setting, back pain visit volume, organization, and region (HRR).FindingsPCNPs (N = 231) and PCMDs (N = 4,779) order low-value back images at similar rates (NP: all images: 26.5%; MRI/CT: 8.4%; MD: all images: 24.5%; MRI/CT: 7.7%), with no detectable significant difference when controlling for covariates.DiscussionPCNPs and PCMDs order low-value back images at an effectively similar rate. 相似文献
4.
5.
6.
7.
Christopher Teng JiaDe Yu Jesse Taylor Adam I. Rubin James R. Treat 《Pediatric dermatology》2019,36(5):697-701
Erosive pustular dermatosis of the scalp (EPDS) is an uncommon chronic inflammatory response to scalp trauma that usually resolves with cicatricial alopecia. It most commonly affects elderly patients with a history of actinic damage. Herein, we describe a 16‐year‐old girl with acrofacial dysostosis type 1 presenting after surgery with crusting purulent scalp lesions, whose clinical presentation and histopathologic findings were consistent with EPDS. A review of the literature on EPDS in children is also detailed. 相似文献
8.
9.
Qian Li Tian-Le Ma You-Qi Qiu Wen-Qiang Cui Teng Chen Wen-Wen Zhang Jing Wang Qi-Liang Mao-Ying Wen-Li Mi Yan-Qing Wang Yu-Xia Chu 《神经科学通报》2020,36(12):1484
Trigeminal neuralgia is a debilitating condition, and the pain easily spreads to other parts of the face. Here, we established a mouse model of partial transection of the infraorbital nerve (pT-ION) and found that the Connexin 36 (Cx36) inhibitor mefloquine caused greater alleviation of pT-ION-induced cold allodynia compared to the reduction of mechanical allodynia. Mefloquine reversed the pT-ION-induced upregulation of Cx36, glutamate receptor ionotropic kainate 2 (GluK2), transient receptor potential ankyrin 1 (TRPA1), and phosphorylated extracellular signal regulated kinase (p-ERK) in the trigeminal ganglion. Cold allodynia but not mechanical allodynia induced by pT-ION or by virus-mediated overexpression of Cx36 in the trigeminal ganglion was reversed by the GluK2 antagonist NS102, and knocking down Cx36 expression in Nav1.8-expressing nociceptors by injecting virus into the orofacial skin area of Nav1.8-Cre mice attenuated cold allodynia but not mechanical allodynia. In conclusion, we show that Cx36 contributes greatly to the development of orofacial pain hypersensitivity through GluK2, TRPA1, and p-ERK signaling.Electronic supplementary materialThe online version of this article (10.1007/s12264-020-00594-4) contains supplementary material, which is available to authorized users. 相似文献