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   32833篇
  免费   1840篇
  国内免费   583篇
耳鼻咽喉   154篇
儿科学   146篇
妇产科学   62篇
基础医学   1825篇
口腔科学   2049篇
临床医学   2850篇
内科学   1174篇
皮肤病学   33篇
神经病学   416篇
特种医学   1954篇
外国民族医学   2篇
外科学   13400篇
综合类   6140篇
现状与发展   1篇
预防医学   1098篇
眼科学   211篇
药学   1980篇
  60篇
中国医学   1522篇
肿瘤学   179篇
  2024年   69篇
  2023年   506篇
  2022年   850篇
  2021年   1455篇
  2020年   1453篇
  2019年   1081篇
  2018年   948篇
  2017年   1095篇
  2016年   1268篇
  2015年   1163篇
  2014年   2442篇
  2013年   2337篇
  2012年   2255篇
  2011年   2439篇
  2010年   1993篇
  2009年   1876篇
  2008年   1659篇
  2007年   1710篇
  2006年   1455篇
  2005年   1375篇
  2004年   1140篇
  2003年   854篇
  2002年   667篇
  2001年   581篇
  2000年   435篇
  1999年   402篇
  1998年   304篇
  1997年   267篇
  1996年   190篇
  1995年   154篇
  1994年   129篇
  1993年   109篇
  1992年   76篇
  1991年   60篇
  1990年   44篇
  1989年   35篇
  1988年   40篇
  1987年   32篇
  1986年   37篇
  1985年   32篇
  1984年   23篇
  1983年   33篇
  1982年   40篇
  1981年   37篇
  1980年   19篇
  1979年   18篇
  1978年   21篇
  1977年   9篇
  1976年   13篇
  1975年   16篇
排序方式: 共有10000条查询结果,搜索用时 312 毫秒
41.
IntroductionThis article deals with the occurrence of health problems due to gunshot wounds to the face among military police officers, in the metropolitan region of Rio de Janeiro, who were submitted to surgery at the Oral and Maxillofacial Surgery and Traumatology Clinic of Hospital Central da Polícia Militar.ObjectiveTo identify the profile of patients submitted to surgery as a result of gunshot wounds, the anatomical distribution of maxillofacial fractures, the identified sequelae and complications, the health specialties involved in the rehabilitation of these patients, and to discuss the social, emotional and work performance-related effects of work among these subjects.MethodsA retrospective epidemiological study was carried out based on secondary data from military police officers who were submitted to surgery at Hospital Central da Polícia Militar due to gunshot wounds from June 2003 to December 2017.ResultsDuring the study period, 778 surgeries were performed in the operating room by the Oral and Maxillofacial Surgery and Traumatology service at Hospital Central da Polícia Militar, 186 of which were due to gunshot wounds (23.9%). All patients were males and the mean age 34.7 years. Bone segment loss was the most common sequela. Facial esthetic impairment and reports of insomnia were the most often identified late consequences of impact on health and social life. Regarding the occupational impacts of the sustained injury, the mean time away from work due to medical leave for the treatment of maxillofacial injuries was 11.7 months.ConclusionThe treatment of gunshot wounds patients with facial injuries requires multiple surgical interventions and their rehabilitation requires the involvement of different health specialties. Further studies are needed to qualitatively analyze the impact of this type of facial trauma on the patients' lives and their social consequences.  相似文献   
42.
43.
Hand surgery involves the surgical treatment of hand conditions and encompasses small bone fixation, arthroscopy, joint replacement and reconstruction of tendon and nerves. Complications following surgery to the hand may be due to patient factors, surgical decisions and the complex anatomy of the hand. Here we describe the complications associated with common surgical interventions for both elective and traumatic injuries to the hand. Following hand surgery, a balance between immobilisation and early range of motion is offset by the risk of wound complications, non-union of fractures and tendon re-rupture with stiffness and reduced range of motion of the digits. Superficial infection is relatively common following procedures to the hand, however long-term sequelae are rare. Implant failure, subsidence, instability and reduced range of motion are seen following arthroplasty procedures. Complex regional pain syndrome offers a significant challenge following injury to the hand and specifically after surgical procedures. Surgeons should consider the risk of particular surgical techniques, other perioperative factors and patient factors that may contribute to the development of complications following hand surgery. Patients should be adequately counselled in order to make an informed decision regarding the management of their condition.  相似文献   
44.
45.
余华伟 《中外医疗》2016,(20):79-80
目的:探讨老年股骨粗隆间骨折手术时机对临床预后结局的影响。方法整群选取2015年1月—2016年1月该院收治的老年股骨粗隆间骨折患者68例为研究对象。根据患者手术时间将其分为A组与B组, A组32例,B组36例,观察两组患者不同年龄术后30 d、1年的死亡情况。结果两组患者术后30d、1年死亡率比较差异无统计学意义,P>0.05;但A组、B组患者中超过80岁的患者术后1年死亡率明显低于80岁以下年龄患者,P<0.05,差异具有统计学意义。结论年龄超过80岁的老年股骨粗隆间骨折患者术后1年死亡率相对较高。  相似文献   
46.
Ewing sarcoma (ES) is a rare primary neoplasm in the lumbar adult spine and may mimic a benign tumor. In this case, after a patient's three-month history of lower back pain and rapidly progressing leg numbness and weakness, magnetic resonance imaging (MRI) showed a mass in the third lumbar vertebra. At a two-month follow-up, imaging showed a fracture, compression and lesion enlargement. Decompression and fixation confirmed ES, and the patient began combined radiotherapy and chemotherapy. Two months postoperatively, residual ES was suspected on MRI. The patient underwent a second surgery, and histopathology confirmed necrosis. A six-month follow-up after the first surgery showed no tumor recurrence. This case supports the inclusion of ES in the differential diagnosis of pathologic spinal fracture. Early decompression and spinal fixation are critical for preserving neurologic and spinal functions in ES complicated by a compression fracture. Combined adjuvant radiotherapy and chemotherapy remain the standard therapeutic strategy.  相似文献   
47.
[目的]采用Meta分析法系统评价补肾壮骨汤对椎体成形术治疗骨质疏松型胸腰椎压缩骨折(OTCF)临床的影响。[方法]以"补肾壮骨汤"为首输关键词,以"椎体成形术""骨质疏松""胸腰椎压缩骨折"等为次输关键词,全面搜索补肾壮骨汤对OTCF患者椎体成形术治疗效果影响的随机对照研究文献,评价纳入研究文献的一般特征,对文献资料所提取的治疗有效率、骨密度、Oswestry功能障碍(ODI)指数、治疗安全性(新发骨折率)等观察指标进行Meta分析处理与分析。[结果]共13篇文献纳入Meta分析范畴,文献总样本量1 037例。分析显示,与对照组相比,治疗组可明显提高临床有效率[OR=4.63,95%CI[2.92,7.36],P0.000 01]、改善骨密度[MD=0.08,95%CI[0.06,0.1],P0.000 01]、降低ODI指数[MD=-2.34,95%CI[-3.49,-1.19],P0.000 01]、降低新发骨折率[OR=0.08,95%CI[0.11,0.44],P0.000 01]。[结论]与单纯椎体成形术治疗相比,补肾壮骨汤辅助椎体成形术在OTCF患者治疗中,可提升患者术后骨密度、改善胸腰椎功能障碍和降低术后新发骨折率,治疗疗效确切。  相似文献   
48.
PurposeInjuries of both pelvic ring and acetabulum as rare very few articles are available in literature. There are no set protocols in defining the injury let alone defining early and definitive management strategies. This article is an attempt to encompass all available data to give us guidelines in managing these injuries.MethodsAn extensive literature review was carried out on PubMed/Medline, google scholar and Embase databases was done with the eligibility criteria of 1) Case series with a minimum of 20 cases. 2) The patient’s outcome reported. 3) Full article available. 4) Article in English. 5) Minimum Jadad score of 3. As per PRISMA guidelines the search was done and gradually filtered down to relevant articles which were 8 in number.ResultsThe incidence of these injuries range from 5 to 16%. The transverse acetabular fracture pattern is the commonest followed by associated both column fractures. There is equal propensity of Anteroposterior compression and lateral compression injuries. The injury mechanism appears to transmitted lateral force from the greater trochanter inwards with an implosion injury causing acetabular and pelvic injury as a continuum. The initial management is similar to managing pelvic ring injuries with focus on patient resuscitation, hemodynamic stabilization and temporary stabilization. The injury severity score and the mortality rates are comparable to isolated unstable pelvic ring injuries. Definitive management focuses on fixing the posterior pelvic ring first followed by the acetabular fracture and then the anterior pelvic ring. The displacement rates and outcome is worse than isolated acetabular injuries or pelvic injuries.ConclusionCombined Pelvic and acetabular injuries are complex injuries which need to be managed initially as we manage pelvic injury and later as we fix as an acetabular fracture meticulously.  相似文献   
49.
50.
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