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   161790篇
  免费   33195篇
  国内免费   2612篇
耳鼻咽喉   5323篇
儿科学   5448篇
妇产科学   2504篇
基础医学   5297篇
口腔科学   1731篇
临床医学   27779篇
内科学   49420篇
皮肤病学   7837篇
神经病学   15585篇
特种医学   7502篇
外科学   42305篇
综合类   274篇
现状与发展   72篇
一般理论   3篇
预防医学   7351篇
眼科学   3545篇
药学   2661篇
中国医学   274篇
肿瘤学   12686篇
  2024年   515篇
  2023年   4847篇
  2022年   1507篇
  2021年   3689篇
  2020年   6282篇
  2019年   2568篇
  2018年   7839篇
  2017年   7720篇
  2016年   8957篇
  2015年   9156篇
  2014年   16344篇
  2013年   16544篇
  2012年   6751篇
  2011年   6788篇
  2010年   11102篇
  2009年   14779篇
  2008年   6514篇
  2007年   4716篇
  2006年   7037篇
  2005年   4269篇
  2004年   3465篇
  2003年   2295篇
  2002年   2297篇
  2001年   3932篇
  2000年   3119篇
  1999年   3263篇
  1998年   3671篇
  1997年   3477篇
  1996年   3374篇
  1995年   3211篇
  1994年   1945篇
  1993年   1563篇
  1992年   1388篇
  1991年   1413篇
  1990年   1062篇
  1989年   1181篇
  1988年   1015篇
  1987年   849篇
  1986年   888篇
  1985年   716篇
  1984年   543篇
  1983年   520篇
  1982年   511篇
  1981年   398篇
  1980年   358篇
  1979年   306篇
  1978年   328篇
  1977年   397篇
  1975年   277篇
  1972年   302篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
971.
972.
973.
The authors report the case of a 33-year-old woman who exhibited, at the age of 17, a left-sided hemiplegia, which was followed by good motor recovery, though with a permanent deficit in fine finger movements. She had a widespread loss of neural tissue in the right hemisphere (crossed cerebrocerebellar atrophy), including (1) marked atrophy and thinning of the precentral and postcentral gyri; (2) widespread deep white matter destruction, including the corticospinal tract; and (3) crossed cerebellar atrophy. Except over the supplementary motor area (SMA), transcranial magnetic stimulation did not elicit motor evoked potentials in the affected hand. Nevertheless, during opening and closing of the affected hand, functional magnetic resonance imaging showed an activation of the lesioned primary sensorimotor cortex (SMC), as well as of the intact SMA and the parietal areas, but not of the ipsilateral motor areas. The authors speculate that recovery was achieved by a motor command generated in the SMC and the parietal cortex, passing through corticospinal axons originating in the SMA.  相似文献   
974.
975.
976.
977.
978.
The gold standard for definitive management of symptomatic benign prostatic hypertrophy is transurethral resection of the prostate (TURP). Despite its efficacy, TURP has significant morbidity/mortality concerns such as hemorrhage and transurethral resection syndrome. This is especially worrisome for the medically high-risk patient, but the high rates of retrograde ejaculation found with TURP also pose a problem for young patients. A minimally invasive, outpatient alternative to TURP that has long-term efficacy, low morbidity/mortality, and provides a cost-effective advantage is in high demand. This review article discusses microwave thermotherapy as such an option and reports the long-term experience with the CoreTherm (CoreTherm Operations AB, Sweden) device.  相似文献   
979.
Contact diode laser myringotomy and mitomycin C in children   总被引:1,自引:0,他引:1  
OBJECTIVE: To investigate the use of contact diode laser myringotomy (C-LAM), combined with topical mitomycin C, as an alternative method for prolonged middle ear ventilation in children with otitis media with effusion. STUDY DESIGN AND SETTING: Prospective study at a tertiary care pediatric institution. METHODS: Fifteen children enrolled in the study. Mitomycin C was applied to the intact tympanic membrane in the right ears, whereas saline on the left side was used for controls. C-LAM was then performed in all ears. Outcome measures included healing rate and scarring, ear infection, and long-term audiometric follow-up. RESULTS: There was no significant difference in median healing rate. In each group, the median was between the third and fourth month. Normal hearing thresholds were obtained in all children at 2-year follow-up. CONCLUSION: C-LAM proved to be an effective method for medium-term ventilation, but topical mitomycin C before C-LAM did not prolong patency rate in our patients. No significant complication was encountered at 2-year follow-up.  相似文献   
980.
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