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   2739篇
  免费   162篇
  国内免费   11篇
耳鼻咽喉   27篇
儿科学   200篇
妇产科学   32篇
基础医学   334篇
口腔科学   74篇
临床医学   206篇
内科学   552篇
皮肤病学   42篇
神经病学   121篇
特种医学   73篇
外科学   357篇
综合类   56篇
一般理论   1篇
预防医学   158篇
眼科学   149篇
药学   362篇
中国医学   38篇
肿瘤学   130篇
  2023年   18篇
  2022年   51篇
  2021年   103篇
  2020年   48篇
  2019年   56篇
  2018年   79篇
  2017年   57篇
  2016年   79篇
  2015年   93篇
  2014年   123篇
  2013年   151篇
  2012年   197篇
  2011年   178篇
  2010年   123篇
  2009年   102篇
  2008年   151篇
  2007年   151篇
  2006年   126篇
  2005年   119篇
  2004年   120篇
  2003年   98篇
  2002年   74篇
  2001年   58篇
  2000年   43篇
  1999年   35篇
  1998年   21篇
  1997年   18篇
  1996年   24篇
  1995年   17篇
  1994年   27篇
  1993年   19篇
  1992年   21篇
  1991年   18篇
  1990年   22篇
  1989年   26篇
  1988年   28篇
  1987年   23篇
  1986年   21篇
  1985年   31篇
  1984年   15篇
  1983年   20篇
  1982年   11篇
  1981年   17篇
  1980年   11篇
  1979年   14篇
  1978年   9篇
  1976年   7篇
  1971年   6篇
  1965年   7篇
  1963年   4篇
排序方式: 共有2912条查询结果,搜索用时 46 毫秒
1.
2.
We report the case of a 20-year-old man with an ipsilateral mid-third clavicle fracture with grade V acromioclavicular joint (ACJ) dislocation. The combination of these two injuries is rare. A literature search produced various treatment algorithms. In this case, the patient was successfully treated with a Bosworth screw.This work was carried out in the Department of Orthopaedics, William Harvey Hospital, Ashford, Kent, UK  相似文献   
3.
4.
The immediate surgical goals in the treatment of thoraco-lumbar fractures are decompression of compromised neural structures and stabilization of the vertebral column. If more sophisticated instrumentation is available, e.g. A.O.-fixateur interne or instrument set according to Kluger, stable reposition and reformation of compressed vertebral bodies also becomes possible. The long-term goals are to prevent delayed onset of spinal deformity, pain, and further neurological deficit. Early operative stabilization also shortens hospitalization time and allows immediate ambulation, thus lessening pulmonary, vascular, urological, and psychological complications. The Department of Neurosurgery, Sher-I-Kashmir Institute of Medical Sciences, treated 75 cases of thoraco-lumbar fractures. Out of 75 cases 63 were operated upon: 32 cases by spinal fusion alone and 31 by a combined procedure of decompression and posterior spinal fusion with fibular graft. 52 showed evidence of recovery ranging from moderate to excellent in a follow-up of 2-3 years. Thus surgery resulted not only in giving a stable spine to patients but also good improvement of neurodeficits. Our experiences demonstrate that operative treatment of thoraco-lumbar fractures can give satisfactory results even in situations where sophisticated instrumentation is not available.  相似文献   
5.
Suppurative corneal ulceration in Bangladesh   总被引:8,自引:0,他引:8  
Suppurative keratitis is an important preventable cause of blindness, particularly in the developing world. This study analyses 142 cases of suppurative keratitis referred to Chittagong Eye Infirmary, Bangladesh. Some 53.5% of cases were bacterial and 35.9% were fungal. The five most common pathogens were: Pseudomonas sp. 24%, Streptococcus pneumoniae 17%, Aspergillus sp. 13%, Fusarium sp. 7% and Curvularia sp. 6%. Gram stain and culture results were consistent in 62.6% of cases. Previous antibiotic treatment was a significant factor for failure of culture isolation and less so for Gram stain failure. On Gram stain, 55.9% of pseudomonal cases were missed, but only 2% of fungal cases were missed. Over all, Gram stain had a sensitivity of 62% and positive predictive value of 84% for bacterial cases, and 98% and 94% for fungal cases, respectively. Fungal ulcers were typically filamentous, but an antecedent history of trauma was not common. The most frequent injury was due to rice grains, but the inoculum appeared to be introduced during eye washing with contaminated water. Pseudomonal ulcers occurred most frequently in the monsoon season, and Fusarium cases were seen only in the hot, dry season.  相似文献   
6.
7.
PURPOSE: The aim of the study was to delineate differences in saccadic adaptation characteristics between a population of racquet sports athletes and nonathletes. METHODS: Eye movements were recorded at 120 Hz using a video-based eye tracker (ELMAR 2020) in a sample of 27 athletes (varsity badminton and squash players) and 14 nonathletes (<3 hours/week participation in recreational sports). Responses to negative positional error and positive positional error were studied in two sessions on separate days. Negative positional errors were induced by displacing the stimuli backwards by 3 degrees from the initial target step (12 degrees). Likewise, positive positional errors were induced by displacing the stimuli forward by 3 degrees . Amplitude gains were calculated for trials before, during, and after the adaptation phase. The magnitude and the rate of change of saccadic adaptation were determined from the amplitude gains. Differences between the groups were compared using regression analysis. RESULTS: No significant differences were found between the two groups in the magnitude of saccadic adaptation, both for negative (athletes -60%, nonathletes -57%) and positive (athletes +26%, and nonathletes +27%) positional error. Racquet sports athletes showed a significantly faster rate of adaptation for the positive positional error. A significant difference was not observed in the rate of adaptation for the negative positional error. CONCLUSIONS: Racquet sports athletes and nonathletes adapt to positional error signals by similar amounts. However, racquet sports athletes respond to positive positional errors at a faster rate, suggesting that a strategic component or environmental influences (such as practice) may play a role in saccadic adaptation.  相似文献   
8.
9.
10.
. We invited Dr Peplau to provide a personal reflection on the recent history of psychiatric nursing and her thoughts on immediate challenges facing the profession. The paper is an individual scholar's commentary on the way that psychiatry has waxed and waned over the years, in relation to nursing. This historical review discovers and reports a challenge to current practice. Dr Peplau describes a professional shift that is pulling nurses toward the subordinate role observed earlier this century. The paper draws attention to how contemporary practice can be positively influenced, e.g., by giving a structure to the allocation and conduct of nurse–patient time.  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