全文获取类型
收费全文 | 165371篇 |
免费 | 51302篇 |
国内免费 | 5172篇 |
专业分类
耳鼻咽喉 | 2473篇 |
儿科学 | 5473篇 |
妇产科学 | 2325篇 |
基础医学 | 25934篇 |
口腔科学 | 6512篇 |
临床医学 | 22979篇 |
内科学 | 37636篇 |
皮肤病学 | 8753篇 |
神经病学 | 17454篇 |
特种医学 | 5772篇 |
外国民族医学 | 51篇 |
外科学 | 23808篇 |
综合类 | 13309篇 |
现状与发展 | 19篇 |
一般理论 | 45篇 |
预防医学 | 10281篇 |
眼科学 | 3486篇 |
药学 | 15139篇 |
74篇 | |
中国医学 | 5631篇 |
肿瘤学 | 14691篇 |
出版年
2024年 | 258篇 |
2023年 | 1324篇 |
2022年 | 3234篇 |
2021年 | 5554篇 |
2020年 | 7959篇 |
2019年 | 13298篇 |
2018年 | 12943篇 |
2017年 | 13850篇 |
2016年 | 14397篇 |
2015年 | 15409篇 |
2014年 | 16295篇 |
2013年 | 16759篇 |
2012年 | 10858篇 |
2011年 | 11204篇 |
2010年 | 13291篇 |
2009年 | 8822篇 |
2008年 | 7112篇 |
2007年 | 5981篇 |
2006年 | 5786篇 |
2005年 | 5329篇 |
2004年 | 4296篇 |
2003年 | 4055篇 |
2002年 | 3777篇 |
2001年 | 3289篇 |
2000年 | 3076篇 |
1999年 | 2433篇 |
1998年 | 1255篇 |
1997年 | 1198篇 |
1996年 | 979篇 |
1995年 | 851篇 |
1994年 | 756篇 |
1993年 | 530篇 |
1992年 | 849篇 |
1991年 | 718篇 |
1990年 | 621篇 |
1989年 | 529篇 |
1988年 | 481篇 |
1987年 | 435篇 |
1986年 | 340篇 |
1985年 | 296篇 |
1984年 | 214篇 |
1983年 | 139篇 |
1982年 | 92篇 |
1981年 | 118篇 |
1980年 | 64篇 |
1979年 | 114篇 |
1978年 | 71篇 |
1974年 | 63篇 |
1973年 | 64篇 |
1972年 | 59篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Kow Chia Siang Ramachandram Dinesh Sangarran Hasan Syed Shahzad 《Journal of thrombosis and thrombolysis》2022,54(2):217-218
Journal of Thrombosis and Thrombolysis - 相似文献
2.
Mette Nissen Tiina‐Mari Ikheimo Jukka Huttunen Ville Leinonen Henna‐Kaisa Jyrkknen Mikael von und zu Fraunberg 《Neuromodulation》2021,24(1):102-111
ObjectiveSpinal cord stimulation (SCS) is an effective treatment in failed back surgery syndrome (FBSS). We studied the effect of preimplantation opioid use on SCS outcome and the effect of SCS on opioid use during a two-year follow-up period.Materials and methodsThe study cohort included 211 consecutive FBSS patients who underwent an SCS trial from January 1997 to March 2014. Participants were divided into groups, which were as follows: 1) SCS trial only (n = 47), 2) successful SCS (implanted and in use throughout the two-year follow-up period, n = 131), and 3) unsuccessful SCS (implanted but later explanted or revised due to inadequate pain relief, n = 29). Patients who underwent explantation for other reasons (n = 4) were excluded. Opioid purchase data from January 1995 to March 2016 were retrieved from national registries.ResultsHigher preimplantation opioid doses associated with unsuccessful SCS (ROC: AUC = 0.66, p = 0.009), with 35 morphine milligram equivalents (MME)/day as the optimal cutoff value. All opioids were discontinued in 23% of patients with successful SCS, but in none of the patients with unsuccessful SCS (p = 0.004). Strong opioids were discontinued in 39% of patients with successful SCS, but in none of the patients with unsuccessful SCS (p = 0.04). Mean opioid dose escalated from 18 ± 4 MME/day to 36 ± 6 MME/day with successful SCS and from 22 ± 8 MME/day to 82 ± 21 MME/day with unsuccessful SCS (p < 0.001).ConclusionsHigher preimplantation opioid doses were associated with SCS failure, suggesting the need for opioid tapering before implantation. With continuous SCS therapy and no explantation or revision due to inadequate pain relief, 39% of FBSS patients discontinued strong opioids, and 23% discontinued all opioids. This indicates that SCS should be considered before detrimental dose escalation. 相似文献
3.
4.
5.
6.
Weina Cheng Yazhi Wang Jingxian Liu Xiaofei Li Ming Yu Cancan Duan Liu Liu Jianyong Zhang 《Journal of applied toxicology : JAT》2022,42(6):970-980
Cantharidin (CTD) is an effective antitumor agent. However, it exhibits significant hepatotoxicity, the mechanism of which remains unclear. In this study, biochemical and histopathological analyses complemented with ultra-high-performance liquid chromatography–tandem mass spectrometry (UHPLC-MS/MS)-based targeted metabolomic analysis of bile acids (BAs) were employed to investigate CTD-induced hepatotoxicity in rats. Sixteen male and female Sprague–Dawley rats were randomly divided into two groups: control and CTD (1.0 mg/kg) groups. Serum and liver samples were collected after 28 days of intervention. Biochemical, histopathological, and BA metabolomic analyses were performed for all samples. Further, the key biomarkers of CTD-induced hepatotoxicity were identified via multivariate and metabolic pathway analyses. In addition, metabolite–gene–enzyme network and Kyoto Encyclopedia of Genes and Genomes pathway analyses were used to identify the signaling pathways related to CTD-induced hepatotoxicity. The results revealed significantly increased levels of biochemical indices (alanine aminotransferase, aspartate aminotransferase, and total bile acid). Histopathological analysis revealed that the hepatocytes were damaged. Further, 20 endogenous BAs were quantitated via UHPLC-MS/MS, and multivariate and metabolic pathway analyses of BAs revealed that hyocholic acid, cholic acid, and chenodeoxycholic acid were the key biomarkers of CTD-induced hepatotoxicity. Meanwhile, primary and secondary BA biosynthesis and taurine and hypotaurine metabolism were found to be associated with the mechanism by which CTD induced hepatotoxicity in rats. This study provides useful insights for research on the mechanism of CTD-induced hepatotoxicity. 相似文献
7.
8.
Evelyne Harkemanne Jean‐Louis Dargent Pierre‐Paul Roquet‐Gravy Audrey Bulinckx 《Pediatric dermatology》2019,36(3):365-367
We report a case of benign lymphoplasmacytic plaque (LPP) in a child. These asymptomatic erythematous papulonodular lesions are an emerging clinicopathological entity. Herein, we describe a previously unreported site for LPP lesions, namely, the volar wrist and the distal ipsilateral palm. 相似文献
9.
10.