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   153696篇
  免费   10100篇
  国内免费   771篇
耳鼻咽喉   1419篇
儿科学   3948篇
妇产科学   2772篇
基础医学   20616篇
口腔科学   3459篇
临床医学   14833篇
内科学   33021篇
皮肤病学   2877篇
神经病学   14831篇
特种医学   6149篇
外国民族医学   6篇
外科学   23111篇
综合类   1905篇
现状与发展   2篇
一般理论   140篇
预防医学   11133篇
眼科学   3206篇
药学   10509篇
  2篇
中国医学   245篇
肿瘤学   10383篇
  2023年   827篇
  2022年   1239篇
  2021年   2832篇
  2020年   1962篇
  2019年   2825篇
  2018年   3434篇
  2017年   2673篇
  2016年   3054篇
  2015年   3523篇
  2014年   5049篇
  2013年   6828篇
  2012年   10550篇
  2011年   11160篇
  2010年   6367篇
  2009年   6056篇
  2008年   10224篇
  2007年   10900篇
  2006年   10380篇
  2005年   10618篇
  2004年   10022篇
  2003年   9498篇
  2002年   8933篇
  2001年   1492篇
  2000年   1127篇
  1999年   1611篇
  1998年   2110篇
  1997年   1649篇
  1996年   1429篇
  1995年   1299篇
  1994年   1152篇
  1993年   1122篇
  1992年   791篇
  1991年   795篇
  1990年   643篇
  1989年   614篇
  1988年   568篇
  1987年   588篇
  1986年   513篇
  1985年   547篇
  1984年   637篇
  1983年   567篇
  1982年   761篇
  1981年   703篇
  1980年   603篇
  1979年   371篇
  1978年   377篇
  1977年   403篇
  1976年   342篇
  1975年   297篇
  1974年   252篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
The Stiff Elbow     
Elbow motion is essential for upper extremity function to position the hand in space. Unfortunately, the elbow joint is prone to stiffness following a multitude of traumatic and atraumatic etiologies. Elbow stiffness can be diagnosed with a complete history and physical exam, supplemented with appropriate imaging studies. The stiff elbow is challenging to treat, and thus, its prevention is of paramount importance. When this approach fails, non-operative followed by operative treatment modalities should be pursued. Upon initial presentation in those who have minimal contractures of 6-month duration or less, static and dynamic splinting, serial casting, continuous passive motion, occupational/physical therapy, and manipulation are non-operative treatment modalities that may be attempted. A stiff elbow that is refractory to non-operative management can be treated surgically, either arthroscopically or open, to eliminate soft tissue or bony blocks to motion. In the future, efforts to prevent and treat elbow stiffness may target the basic science mechanisms involved. Our purpose was to review the etiologies, classification, evaluation, prevention, operative, and non-operative treatment of the stiff elbow.  相似文献   
53.
54.
55.
56.
The purpose of the study was to determine the incidence, risk factors, treatment, and influence on survival of patients with de novo esophageal cancer after liver transplantation (LT). From 1988 to 2006, 1,926 patients underwent LT in our institution. A total of 9 patients (0.5%) developed a de novo esophageal cancer and 1 patient a cancer of the cardia (0.05%). A retrospective analysis was performed to reveal underlying diseases, timeframes between LT and appearance of cancer, predisposing factors, cancer therapy, complications, immunosuppressive regimens, and survival. Of our 10 patients, 7 (70%) suffered from esophageal squamous cell carcinoma (SCC) and 3 patients (30%) developed an adenocarcinoma, including the patient with cancer of the cardia. A total of 9 patients were transplanted due to alcoholic cirrhosis; 1 patient suffered from hepatocellular carcinoma in nonA-nonB hepatitis-related cirrhosis. Median time to tumor diagnosis was 51 months after transplantation. A total of 5 patients were treated conservatively with combined radiochemotherapy and 5 underwent surgical resection. Patients with radiochemotherapy showed a mean survival of 14.8 months vs. 24.8 months for the patients of the surgery group. No major postoperative complication has been observed. A total of 2 patients of the surgery group are still alive after a follow-up of 15 and 89 months. In conclusion, de novo esophageal and cancer of the cardia after LT is a rare event. In spite of immunosuppression, no increased complication rate has been observed. Patients may have a survival benefit from surgical resection.  相似文献   
57.
58.
59.
Twelve patients had limited arthrodesis between the scaphoid and the lunate for chronic static scapholunate dissociation using internal plate osteosynthesis. The median time between the injury and surgery was 50 months (range 9-180). They were followed up for a year postoperatively. Preoperative symptoms were pain, functional impairment, and restricted movement. During operation the scapholunate interosseous ligament was completely torn and the scaphoid malrotated in all patients. The range of motion was measured preoperatively and postoperatively, and the unaffected side used for control. For all patients except one postoperative extension, flexion, and radial deviation had considerably decreased. However, supination increased in seven of 12 patients postoperatively and so did pronation in seven of 12 patients. One patient (case 12) had an improved range of motion postoperatively in all directions. The mean grip strength was 76% of the unaffected side preoperatively, and has increased to 85% postoperatively. We found that bone healing was rare and most arthrodeses healed by a fibrous union. We found no correlation with preoperative arthrosis and clinical outcome. One patient had retired from work before operation because of back pain and one because of age. Two patients had taken early retirement because of wrist pain, and one patient was still on sick-leave at the follow-up a year postoperatively. Five patients returned to full-time work and two patients to part-time work. Four patients were on long-term sick-leave preoperatively and three of them returned to their previous occupations. Analysis of the patients' subjective outcome (including pain and functional scores) showed overall satisfaction, and objective data show that scapholunate arthrodesis for chronic static scapholunate dissociation provides substantial improvement over the preoperative condition.  相似文献   
60.
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