全文获取类型
收费全文 | 155594篇 |
免费 | 49035篇 |
国内免费 | 2832篇 |
专业分类
耳鼻咽喉 | 2674篇 |
儿科学 | 5053篇 |
妇产科学 | 1538篇 |
基础医学 | 28124篇 |
口腔科学 | 6585篇 |
临床医学 | 20320篇 |
内科学 | 36560篇 |
皮肤病学 | 9619篇 |
神经病学 | 18373篇 |
特种医学 | 6478篇 |
外国民族医学 | 7篇 |
外科学 | 23438篇 |
综合类 | 5359篇 |
现状与发展 | 5篇 |
一般理论 | 40篇 |
预防医学 | 8737篇 |
眼科学 | 3236篇 |
药学 | 13742篇 |
18篇 | |
中国医学 | 3853篇 |
肿瘤学 | 13702篇 |
出版年
2024年 | 226篇 |
2023年 | 1059篇 |
2022年 | 2687篇 |
2021年 | 4880篇 |
2020年 | 6916篇 |
2019年 | 12706篇 |
2018年 | 12458篇 |
2017年 | 13270篇 |
2016年 | 14457篇 |
2015年 | 15533篇 |
2014年 | 16096篇 |
2013年 | 16944篇 |
2012年 | 11549篇 |
2011年 | 11067篇 |
2010年 | 12977篇 |
2009年 | 8683篇 |
2008年 | 6831篇 |
2007年 | 5387篇 |
2006年 | 4914篇 |
2005年 | 4349篇 |
2004年 | 3651篇 |
2003年 | 3482篇 |
2002年 | 3138篇 |
2001年 | 2961篇 |
2000年 | 2593篇 |
1999年 | 1688篇 |
1998年 | 724篇 |
1997年 | 596篇 |
1996年 | 465篇 |
1995年 | 389篇 |
1994年 | 348篇 |
1993年 | 270篇 |
1992年 | 472篇 |
1991年 | 453篇 |
1990年 | 411篇 |
1989年 | 362篇 |
1988年 | 326篇 |
1987年 | 318篇 |
1986年 | 245篇 |
1985年 | 206篇 |
1984年 | 141篇 |
1983年 | 122篇 |
1982年 | 69篇 |
1981年 | 80篇 |
1979年 | 101篇 |
1978年 | 76篇 |
1975年 | 57篇 |
1974年 | 65篇 |
1973年 | 57篇 |
1972年 | 56篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
2.
Kim Wonse Park Heungju Park Jin Joo Kook Woong 《Social psychiatry and psychiatric epidemiology》2022,57(1):47-56
Social Psychiatry and Psychiatric Epidemiology - The negative effect of catastrophic financial loss on suicide risk is widely perceived but hardly studied in-depth because of various difficulties... 相似文献
3.
目的分析细棒、PEEK棒固定对寰枢关节稳定性的影响。方法采用6具新鲜成人枕骨(occipital bone,Oc)~颈椎C4节段进行测试,模拟以下手术及固定状态:①完整状态;②损伤状态:枢椎齿状突II型骨折;③坚强固定:寰枢椎均采用普通椎弓根螺钉固定,直径3.5 mm钛棒连接;④PEEK棒:直径3.5 mm的PEEK棒连接;⑤细棒:直径2.0 mm钛棒连接。采用重复测量实验设计,在完整、损伤和不同的固定状态下,通过脊柱试验机对标本分别施加1.5 N·m的前屈/后伸、左/右侧弯和左/右轴向旋转的纯力偶矩。采用Optotrak三维运动测量系统连续采集标本运动,分析寰枢椎之间角度运动范围和中性区。结果采用直径3.5 mm的钛棒,2.0 mm的细棒以及3.5 mm的PEEK棒固定后,在前屈、后伸、侧弯和旋转方向上均显著减小了固定节段的运动范围(P<0.05)。直径3.5 mm和2.0 mm的棒固定后的运动范围,在各个方向上无显著性差异。PEEK棒固定的运动范围仅在侧弯方向上大于坚强固定(P=0.005),其他方向无显著性差异。3种固定方式在屈伸、侧弯和旋转方向上均显著减小了固定节段的中性区(P<0.05)。各种固定方式之间相比较,无显著性差异(P>0.05)。结论在寰枢关节采用直径2.0 mm的细棒固定,与坚强固定的稳定性相当。采用直径3.5 mm的PEEK棒固定,在前屈、后伸、旋转方向上与坚强固定的稳定性相当,在侧弯方向上弱于坚强固定。 相似文献
4.
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
5.
6.
Post-induction hypotension is common and associated with postoperative complications. We hypothesised that pneumatic leg compression reduces post-induction hypotension in elderly patients undergoing robot-assisted laparoscopic prostatectomy. In this double-blind randomised study, patients were allocated randomly to the pneumatic leg compression group (n = 50) or control (n = 50). In the intervention group, pneumatic leg compression was initiated before induction of anaesthesia. In the control group, pneumatic leg compression was initiated 20 min after anaesthesia induction. The primary outcome was the incidence of post-induction hypotension in these groups. Post-induction hypotension was defined as systolic blood pressure < 90 mmHg during the first 20 min after induction. Haemodynamic variables and area under the curve of post-induction systolic blood pressure over time were assessed. Complications associated with pneumatic leg compression were recorded, including: peripheral neuropathy; compartment syndrome; extensive bullae beneath the leg sleeves; and pulmonary thromboembolism. The incidence of post-induction hypotension decreased in the pneumatic leg compression group compared with that in the control group; 5 (10%) vs. 29 (58%), respectively, p < 0.001. In the pneumatic leg compression group, the lowest systolic, diastolic and mean blood pressures 20 min after induction of anaesthesia were significantly greater than the control group. Pneumatic leg compression resulted in an increased area under the curve of systolic blood pressure in the first 20 min after induction, p = 0.001. There were no pneumatic leg compression-related complications. Pneumatic leg compression reduced post-induction hypotension in elderly patients undergoing robot-assisted laparoscopic prostatectomy, suggesting that it is an effective and safe intervention to prevent post-induction hypotension among elderly patients undergoing general anaesthesia. 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.