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   52387篇
  免费   3133篇
  国内免费   1338篇
耳鼻咽喉   378篇
儿科学   1043篇
妇产科学   356篇
基础医学   3630篇
口腔科学   586篇
临床医学   7232篇
内科学   10480篇
皮肤病学   593篇
神经病学   2501篇
特种医学   1562篇
外国民族医学   2篇
外科学   6166篇
综合类   8138篇
现状与发展   3篇
预防医学   2915篇
眼科学   2868篇
药学   5836篇
  44篇
中国医学   2299篇
肿瘤学   226篇
  2024年   116篇
  2023年   896篇
  2022年   1502篇
  2021年   2042篇
  2020年   1839篇
  2019年   1597篇
  2018年   1608篇
  2017年   1567篇
  2016年   1572篇
  2015年   1516篇
  2014年   3283篇
  2013年   3877篇
  2012年   2790篇
  2011年   3097篇
  2010年   2356篇
  2009年   2273篇
  2008年   2384篇
  2007年   2389篇
  2006年   2186篇
  2005年   1882篇
  2004年   1598篇
  2003年   1314篇
  2002年   1168篇
  2001年   1195篇
  2000年   943篇
  1999年   846篇
  1998年   779篇
  1997年   769篇
  1996年   660篇
  1995年   690篇
  1994年   616篇
  1993年   514篇
  1992年   521篇
  1991年   464篇
  1990年   436篇
  1989年   380篇
  1988年   401篇
  1987年   359篇
  1986年   307篇
  1985年   326篇
  1984年   327篇
  1983年   199篇
  1982年   258篇
  1981年   212篇
  1980年   187篇
  1979年   162篇
  1978年   142篇
  1977年   88篇
  1976年   74篇
  1975年   51篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.
ContextMedial tibial stress syndrome (MTSS) is an overuse injury occurring among the physically active. Linked to increased strain on the medial tendons of the ankle, studies emphasize controlling medial foot loading in the management of this condition. Kinesio taping (KT) has gained popularity for treating musculoskeletal pathologies; however, its effect on MTSS remains uninvestigated. This study aimed to determine if healthy participants and patients with current or previous history of MTSS differ in the rate of loading, and if KT affects plantar pressures in these participants.MethodsTwenty healthy participants and 20 participants with current or previous history of MTSS were recruited and walked across a plantar pressure mat prior to KT application, immediately after application, and after 24-h of continued use. Time-to-peak force was measured in 6 foot areas and compared across groups and conditions.ResultsANOVA revealed a significant interaction between group, condition, and foot area (F = 1.990, p = 0.033). MTSS participants presented with lower medial midfoot time-to-peak force before tape application (95%CI: 0.014–0.160%, p = 0.021) that significantly increased following tape application (p < 0.05).ConclusionsThese results suggest that KT decreases the rate of medial loading in MTSS patients. Future research might assess mechanisms by which this effect is achieved.  相似文献   
993.
Impairment of coronary artery flow, in either acute or chronic conditions, is a severe complication of transcatheter aortic valve (TAV) implantation, which can arise due to improper TAV positioning. However, little work has been done to quantify the effects of the TAV positioning on the coronary flow. In this study, a realistic in vitro model of coronary artery flow was developed and used to investigate the impact of TAV deployed orientations on coronary flow. The coronary hemodynamics was first replicated mathematically using a lumped parameter model with time‐varying myocardial resistance. Based on the analytical model, two stepper motor controlled stopcock valves were integrated in a left heart simulator to represent the variable myocardial resistance in the experimental setup. The coronary flow and pressure waveforms obtained from the in vitro system were consistent with published data. With a TAV deployed in different orientations, the measured results demonstrated that TAV orientation does not have a significant impact on the coronary flow. The developed in vitro model can be further utilized to simulate coronary flow under various pathological conditions.  相似文献   
994.
995.
996.
Conclusion: IBCT technique should be preferred owing to its high graft survival rate and ABG gain. While no significant difference was found in middle ear pressures between ears that underwent IBCT and normal ears, compliance values were found to be decreased in patients undergoing IBCT. However, the lack of correlation between ABG gain and compliance values indicated that compliance increase had no effect on post-operative ABG results. Objective: The aim of the present study was to compare tympanometric and audiological parameters in patients undergoing inlay butterfly cartilage tympanoplasty (IBCT) with their normal ears and to determine their difference with normal ear tympanometric parameters. Methods: Overall, 25 patients that underwent an operation between August 2010–May 2014 were included in the present study. In 13 of these patients, the ear that did not undergo operation was normal. 0.5, 1, 2, 4?kHz pure sound average values, tympanometric measurements and compliance values of normal and operated ears were compared. Results: The graft survival rate in patients was found to be 92%. Mean pre-operative air–bone gap (ABG) was 16.4?±?5.4 in patients, while mean post-operative ABG was 10.9?±?5.8, with a statistically significant difference (p?=?0.001) While there was no significant difference between operated and normal ears of patients in terms of middle ear pressure (0.441), compliance values were significantly higher in normal ears than those in operated ears (0.032). When post-operative ABG gain was compared with compliance values, no significant correlation was found between ABG gain and compliance measurements (r?=??0.025 and p?=?0.936).  相似文献   
997.
998.
999.
We reported a 30 years old man who suffered a bite wound of the right hand in a fight. Two days after the injury, he was admitted in emergency because of stab wound above the head of the third metacarpal bone. He presented the swelling, redness, pain and fever. Primary revision confirmed only partial lesion of the extensor apparatus. During the following days, we recorded a deterioration of local findings and magnetic resonance imaging revealed osteomyelitis and septic arthritis of the third metacarpophalangeal joint. The wound was then revised several times using negative pressure wound therapy in combination with intravenous antibiotics. After resolution of clinical and laboratory findings, the wound was finally closed by delayed primary suture. Clenched fist injury is a medical emergency that requires immediate surgical revision. We treated clenched fist injury with the development of septic arthritis and osteomyelitis with negative pressure wound therapy and obtained good outcomes.  相似文献   
1000.
【摘要】目的:探讨负压球结合引流袋应用于骨科脊柱手术及关节置换术后引流效果及安全性,旨在探究适合骨科手术术后引流的最佳引流方法,提高患者术后恢复效果。方法:选取2014年2~8月来我院行脊柱手术和关节置换术的120例患者为研究对象,按照就诊先后顺序分为观察组和对照组,每组60例。术后观察组患者采用负压球联合引流袋引流法引流,对照组患者采用常规方法进行引流。观察并比较两组总引流量、持续引流时间、引流管更换次数和平均住院天数等指标;比较两组患者治疗有效率和患者满意度;同时比较两组患者发生感染、引流失血、神经血管损伤及关节肿胀等并发症情况。结果:(1)观察组患者总引流量、持续引流时间、引流管更换次数和平均住院天数等指标均优于对照组,差异具有统计学意义(P<0.05);(2)观察组治疗总有效率为96.67%(58/60),较对照组83.33%(50/60)偏高,差异具有统计学意义(P<0.05);(3)相比于对照组并发症总发生率20.00%(12/60),观察组患者出现感染、引流失血等并发症概率为6.67%(4/60),远偏低,差异也具有统计学意义(P<0.05)。结论:负压球联合引流袋应用于骨科脊柱手术及关节置换术后引流效果较常规引流方法效果好,其安全性也较高。  相似文献   
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