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   59139篇
  免费   3250篇
  国内免费   80篇
耳鼻咽喉   882篇
儿科学   1768篇
妇产科学   1369篇
基础医学   8787篇
口腔科学   2203篇
临床医学   5597篇
内科学   10578篇
皮肤病学   1452篇
神经病学   6385篇
特种医学   2773篇
外科学   8228篇
综合类   211篇
一般理论   32篇
预防医学   3856篇
眼科学   1165篇
药学   4018篇
中国医学   88篇
肿瘤学   3077篇
  2023年   322篇
  2022年   242篇
  2021年   517篇
  2020年   590篇
  2019年   625篇
  2018年   1293篇
  2017年   1112篇
  2016年   1438篇
  2015年   1155篇
  2014年   1335篇
  2013年   2477篇
  2012年   3090篇
  2011年   3537篇
  2010年   1875篇
  2009年   1205篇
  2008年   3525篇
  2007年   3706篇
  2006年   3470篇
  2005年   3373篇
  2004年   3243篇
  2003年   3291篇
  2002年   3209篇
  2001年   2561篇
  2000年   3270篇
  1999年   1744篇
  1998年   574篇
  1997年   491篇
  1996年   380篇
  1995年   330篇
  1994年   332篇
  1993年   328篇
  1992年   311篇
  1991年   252篇
  1990年   246篇
  1989年   320篇
  1988年   218篇
  1987年   235篇
  1986年   248篇
  1985年   300篇
  1984年   337篇
  1983年   270篇
  1982年   261篇
  1981年   222篇
  1980年   214篇
  1979年   236篇
  1978年   182篇
  1977年   196篇
  1976年   194篇
  1975年   170篇
  1973年   175篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
Type 1 diabetes is one of the commonest chronic disorders encountered in children and adolescents. When it first becomes apparent in children, approximately 20% of them have clinical and biochemical signs of ketoacidosis (DKA). In the presence of unusual clinical symptoms it is necessary to consider the possibility of associated conditions, such as coeliac disease, immunothyroiditis and Addison’s disease. Children with diabetes must be treated by a multidisciplinary team made up of paediatrician, paediatric diabetes specialist, psychologist, social worker, ophthalmologist, dietitian, nurse and diabetes counsellor, making it essential for them to be treated in regional specialised centres. They are treated in their own psychosocial environment and their families are involved in the therapy. Comprehensive, multidisciplinary treatment strategies have now made it possible for these patients to enjoy normal physical wellbeing and near-normal psychosocial development. Prevention and early treatment of of disturbances associated with diabetes remain an important concern. The fact that type 2 diabetes must now be looked for in overweight children and adolescents is a new aspect of diabetes medicine.  相似文献   
3.
4.
5.
Transforaminal injections are sometimes used for the diagnosis and treatment of painful conditions in the lumbar and to a lesser degree in the cervical spine. The technique is most often used when investigating/treating radiculopathy caused by degenerative disease. But how selective are the nerve root blocks? What possible structures other than the intended nerve root are affected from such injections? This study was undertaken in order to try to answer these questions, as no study focusing on the possible spread from the transforaminal selective nerve root blocks in the cervical spine has been performed earlier. In three groups of patients, each group including three patients, we injected three different volumes (0.6, 1.1 and 1.7 ml) with a transforaminal technique in the cervical spine. In all the injections, a small amount of contrast media was added. The spread of the injections were then investigated using multi-slice computed tomography with reconstructions. The imaging revealed a possible effect on other nerve roots than the intended ones when a larger volume was used for the root blocks. The spread was related to the injected volume as well as to local anatomy (size of foraminal area). In this study, only 0.6-ml injections could be accepted for being selective enough for diagnostic investigations.  相似文献   
6.
PATIENTS AND METHOD: The aim of the present study was to contribute to a more accurate indication and better integration of developing third molar transplantation into orthodontic space management, using the results gleaned from the authors' own pool of patients. For this purpose, a clinical and radiographic examination of 61 transplanted developing molars in 57 patients was carried out after an average of 3.3 years. RESULTS: The overall success rate was 85%. Failure was due in 10% of cases to impaired periodontal healing (inflammatory root resorption, ankylosis, or increased pocket probing depths) and in 5% of cases to insufficient or arrested postoperative root development accompanied by increased transplant mobility. The incidence of postoperative cessation of further root development was significantly higher (p = 0.011) in transplants at early developmental stages, which also had a negative impact on the final root length, the crown-root ratio and the mobility values of these transplants. CONCLUSIONS: The transplantation of developing third molars should be given stronger consideration in treatment plans for orthodontic space management although it represents a real alternative to orthodontic space closure only in exceptional cases. However, unlike implantological or prosthodontic treatment, it offers an opportunity to replace a missing or non-retainable tooth with a patient's own vital and fully functional tooth, provided the appropriate transplant is selected.  相似文献   
7.
8.
9.
10.
Advanced malignant melanomas of the uvea unsuited for an eye salvaging approach require enucleation of the tumor containing eye. A series of 68 patients is reported who underwent enucleation combined with insertion of a spherical dura-encased implant after 30 Gray pre-irridiation therapy of the orbit. Postoperative results with special attention to cosmetic outcome and motility of the prosthesis suggest that the insertion of an orbital implant should be preferred to the enucleation with no implant.  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