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   41173篇
  免费   2272篇
  国内免费   143篇
耳鼻咽喉   529篇
儿科学   2597篇
妇产科学   759篇
基础医学   4885篇
口腔科学   1135篇
临床医学   2955篇
内科学   7510篇
皮肤病学   1175篇
神经病学   2416篇
特种医学   1206篇
外科学   6235篇
综合类   1328篇
一般理论   19篇
预防医学   2106篇
眼科学   1408篇
药学   4121篇
中国医学   357篇
肿瘤学   2847篇
  2023年   302篇
  2022年   729篇
  2021年   1696篇
  2020年   928篇
  2019年   1021篇
  2018年   1438篇
  2017年   1046篇
  2016年   1381篇
  2015年   1397篇
  2014年   2019篇
  2013年   2314篇
  2012年   3277篇
  2011年   3189篇
  2010年   1919篇
  2009年   1496篇
  2008年   2138篇
  2007年   2183篇
  2006年   1957篇
  2005年   1758篇
  2004年   1626篇
  2003年   1384篇
  2002年   1191篇
  2001年   801篇
  2000年   720篇
  1999年   612篇
  1998年   274篇
  1997年   219篇
  1996年   230篇
  1995年   200篇
  1994年   161篇
  1993年   135篇
  1992年   370篇
  1991年   347篇
  1990年   368篇
  1989年   336篇
  1988年   289篇
  1987年   250篇
  1986年   242篇
  1985年   235篇
  1984年   183篇
  1983年   127篇
  1982年   69篇
  1981年   78篇
  1980年   69篇
  1979年   112篇
  1978年   71篇
  1977年   89篇
  1976年   67篇
  1973年   64篇
  1971年   61篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
71.
72.
An ankylosed tooth can be suitable for obtaining orthodontic anchorage. However, if such a tooth lacks adequate clinical crown height, the anchorage will not be effective. In those situations surgical luxation or restorative crown augmentation is suggested. This case report is about the restorative treatment of an ankylosed, infraoccluded tooth to enhance the anchorage for forced orthodontic eruption of impacted maxillary canines. A crown augmentation in the form of a modified bilayered (sandwich) restoration using GIC, Composite resin and Silver amalgam on left maxillary first molar (26) was successful in sustaining the anchorage for forced eruption and alignment of impacted canines.  相似文献   
73.
Defects involving the distal leg and foot are frequently encountered following various aetiological factors. Paucity of local tissue causes surgeons to resort to the retrograde peninsular flap, the cross leg flap or the free flap. With specific knowledge of perforators, the fasciocutaneous flap from the calf area can be transferred to the defect in a single stage based on skeletonised distal perforators. The surgical anatomy, flap planning and procedure have been detailed. Nineteen patients were treated during the period 1995 to 2005. The perforators were identified preoperatively by audio Doppler. The flaps were marked and dissected proximal to the defect skeletonising the distal perforators under loupe magnification and transferred to the defect in a single stage. The donor site was skin grafted. Out of 19 cases, 16 flaps healed uneventfully, one flap necrosed completely and in two cases there was marginal necrosis. The cases were followed up for 2-10 years with an average of 6 years. With detailed knowledge of perforators one can safely reconstruct distal moderate-size defects of the lower limb in a single stage, thus having the benefits of free tissue transfer without resorting to microsurgery. This technique has proved to be an advancement in the reconstructive repertoire allowing flaps of non conventional dimensions to be perfused by skeletonised perforators.  相似文献   
74.
The treatment of Legg-Calvé-Perthes disease remains controversial. The aim of this survey was to ascertain the current management strategies of this condition amongst UK paediatric orthopaedic surgeons, with particular regard to containment procedures in the fragmentation phase. Questionnaires were distributed at the January 2006 meeting of the British Society for Children’s Orthopaedic Surgery (BSCOS) and was posted to all absent members. The results showed a great deal of variability not only in the treatment of Perthes disease, but also in the decision-making processes. Consideration must now be given to a carefully constructed national multi-centre prospective randomised controlled study into the optimum management of this disease  相似文献   
75.
76.
Laparoscopic cholecystectomy for left-sided gallbladder (sinistroposition).   总被引:1,自引:0,他引:1  
Transposition of the gallbladder to the left side without situs inversus viscerum is rare. These gallbladders are situated under the left lobe of the liver between Segment III and IV or on Segment III to the left of the falciform ligament. Because routine preoperative studies may not detect the anomaly, it may provide the surgeons with an unusual surprise during laparoscopy. Awareness of the unpredictable confluence of the cystic duct into the common bile duct and selective use of intraoperative cholangiography aid in the safe laparoscopic management of this unusual problem.  相似文献   
77.
78.
79.
80.
Extrame dullary plasmacytoma of larynx is extremely rare. We report a case of multiple myeloma which presented as extrame dullary manifestation in larynx. The rarity of incidence and difficulty in diagnosis of the disease is discussed.  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