首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   92236篇
  免费   44950篇
  国内免费   467篇
耳鼻咽喉   1956篇
儿科学   4341篇
妇产科学   700篇
基础医学   18689篇
口腔科学   5295篇
临床医学   13884篇
内科学   26612篇
皮肤病学   8203篇
神经病学   14556篇
特种医学   3282篇
外国民族医学   3篇
外科学   15976篇
综合类   313篇
现状与发展   1篇
一般理论   28篇
预防医学   4735篇
眼科学   1717篇
药学   7511篇
  3篇
中国医学   1384篇
肿瘤学   8464篇
  2024年   13篇
  2023年   135篇
  2022年   176篇
  2021年   2201篇
  2020年   5409篇
  2019年   11234篇
  2018年   10621篇
  2017年   11787篇
  2016年   12686篇
  2015年   12870篇
  2014年   13010篇
  2013年   13480篇
  2012年   6280篇
  2011年   6016篇
  2010年   9958篇
  2009年   6188篇
  2008年   3255篇
  2007年   2007篇
  2006年   1833篇
  2005年   1540篇
  2004年   1285篇
  2003年   1224篇
  2002年   1243篇
  2001年   1002篇
  2000年   900篇
  1999年   436篇
  1998年   132篇
  1997年   115篇
  1996年   60篇
  1995年   58篇
  1994年   60篇
  1993年   38篇
  1992年   65篇
  1991年   47篇
  1990年   45篇
  1989年   38篇
  1988年   22篇
  1987年   20篇
  1986年   24篇
  1985年   18篇
  1984年   21篇
  1983年   15篇
  1982年   7篇
  1981年   16篇
  1980年   5篇
  1979年   12篇
  1978年   5篇
  1977年   6篇
  1976年   9篇
  1974年   7篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
2.
本文通过对《中医基本名词术语中英对照国际标准》和《WHO西太平洋地区传统医学名词术语国际标准》舌诊术语进行比较,分析两部标准中舌诊术语英译的优缺点,提出更适宜优先选择作为中医舌诊术语英译标准的方案,以期为中医名词术语标准化工作提供参考。  相似文献   
3.
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   
4.
5.
Metformin, a drug for type 2 diabetes mellitus, has shown therapeutic effects for various cancers. However, it had no beneficial effects on the survival rate of human malignant mesothelioma (HMM) patients. The present study was performed to elucidate the underlying mechanism of metformin resistance in HMM cells. Glucose‐starved HMM cells had enhanced resistance to metformin, demonstrated by decreased apoptosis and autophagy and increased cell survival. These cells showed abnormalities in mitochondria, such as decreased ATP synthesis, morphological elongation, altered mitochondrial permeability transition pore and hyperpolarization of mitochondrial membrane potential (MMP). Intriguingly, Mdr1 was significantly upregulated in mitochondria but not in cell membrane. The upregulated mitochondrial Mdr1 was reversed by treatment with carbonyl cyanide m‐chlorophenyl hydrazone, an MMP depolarization inducer. Furthermore, apoptosis and autophagy were increased in multidrug resistance protein 1 knockout HMM cells cultured under glucose starvation with metformin treatment. The data suggest that mitochondrial Mdr1 plays a critical role in the chemoresistance to metformin in HMM cells, which could be a potential target for improving its therapeutic efficacy.  相似文献   
6.
7.
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   
8.
9.
10.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号