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   15112篇
  免费   2135篇
  国内免费   54篇
耳鼻咽喉   211篇
儿科学   490篇
妇产科学   279篇
基础医学   2252篇
口腔科学   279篇
临床医学   1675篇
内科学   3093篇
皮肤病学   184篇
神经病学   1273篇
特种医学   972篇
外国民族医学   1篇
外科学   1929篇
综合类   661篇
一般理论   12篇
预防医学   1739篇
眼科学   231篇
药学   1121篇
中国医学   29篇
肿瘤学   870篇
  2021年   167篇
  2020年   151篇
  2019年   220篇
  2018年   296篇
  2017年   195篇
  2016年   195篇
  2015年   228篇
  2014年   300篇
  2013年   482篇
  2012年   671篇
  2011年   682篇
  2010年   431篇
  2009年   365篇
  2008年   586篇
  2007年   571篇
  2006年   571篇
  2005年   567篇
  2004年   574篇
  2003年   537篇
  2002年   507篇
  2001年   465篇
  2000年   564篇
  1999年   463篇
  1998年   355篇
  1997年   265篇
  1996年   288篇
  1995年   263篇
  1994年   236篇
  1993年   221篇
  1992年   377篇
  1991年   366篇
  1990年   320篇
  1989年   388篇
  1988年   334篇
  1987年   352篇
  1986年   316篇
  1985年   341篇
  1984年   275篇
  1983年   253篇
  1982年   207篇
  1981年   144篇
  1980年   123篇
  1979年   215篇
  1978年   159篇
  1977年   164篇
  1976年   143篇
  1975年   120篇
  1974年   118篇
  1973年   115篇
  1971年   97篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
The lowest recurrence rates after inguinal hernia repair have been achieved by specialized hernia clinics. The Shouldice repair achieves success through application of a meticulous standardized operation carried out by specialist hernia surgeons. In a trial designed to rule out surgeon-dependent variables, 322 inguinal hernias were randomized prospectively to Shouldice repair or plication darn. Fifteen general surgeons operated on 322 patients. Fourteen surgeons in training not familiar with Shouldice repair received constant supervision for six repairs before independent operation. The mean (s.d.) patient age was 58.3(1.5) (range 20-84) years for Shouldice repair and 57.0(1.2) (range 18-85 years) for plication darn. The sex ratio (M:F) was 17:1 and right side to left side ratio 1.8:1. Six-week complication rates for wound infection (Shouldice repair, 5 per cent; plication darn, 4 per cent) and haematoma (Shouldice repair, 7 per cent; plication darn, 5 per cent) were similar in both groups. There were a similar number of sliding hernias in the Shouldice repair (14) and plication darn (20) groups. After a mean follow-up of 30 (range 24-48) months there were seven recurrences in the Shouldice group and four in the plication darn group (P > 0.05). The recurrences suggest that additional supervision of junior surgeons is required during the Shouldice repair learning period.  相似文献   
92.
93.
This study compared clinical outcomes and nursing labor costs associated with (a) balsam Peru, hydrogenated castor oil, and trypsin (BCT) ointment; (b) BCT + Other; and (c) Other treatments in 2014 wound episodes occurring in 861 patients (mean 2.34 wounds/patient). Treatment with BCT ointment or BCT + Other was associated with a higher healing rate (P < .05). No Stage 1 or 2 ulcer treated with BCT ointment progressed, compared with 13.8% treated with BCT + Other and 13.4% treated with Other. The reported mean duration of treatment and time to heal were shorter for ulcers treated with BCT ointment, but differences did not reach significance, possibly because of the variability in reported treatment times. Mean daily nursing labor costs were lower for treatment with BCT than Other ($50.8 vs $61.7, P < .05). These data suggest that treatment of Stage 1 or 2 ulcers with BCT may be associated with shorter treatment time and time to heal and a potential reduction in treatment-related nursing labor costs.  相似文献   
94.
95.
Dislocation after total hip arthroplasty. Causes and prevention   总被引:31,自引:0,他引:31  
In this prospective study, a technique of positioning the acetabulum by bony landmarks of the pelvis in the standing position was developed using a standing lateral preoperative roentgenogram with the X-ray tube centered over the trochanter. Since 1984, 441 total hip arthroplasties (THAs) were done through the posterior approach with a 1.14% dislocation rate through 1988 and no dislocations in 1989. To prevent impingement and dislocation, it was determined that the safest range for cup position was 30 degrees-50 degrees abduction and 20 degrees-40 degrees flexion from the horizontal. To measure postoperative cup position, a standing true lateral roentgenogram of the operated hip allowed direct measurement of cup flexion and was reproducible within 10 degrees. No special instruments are necessary for this technique, which can be used with any THA system.  相似文献   
96.
97.
A human chromosomal translocation t(8;9) was detected using two-color fluorescence in situ hybridization with probes capable of staining the entire lengths of each of these chromosomes. The chromosome 8 probe was labeled with biotin and detected with Texas red, while the chromosome 9 probe was labeled with AAF and detected with FITC . In normal metaphase spreads, two metaphases from the proband, two red, one green and one part red and part green derivative chromosome were seen. The bicolor chromosome corresponded to translocation of a chromosome 8 segment to the distal part of the q region of one chromosome 9, as originally indicated by banding analysis. In interphase nuclei of the proband, four domains with bright fluorescence were recognized in many nuclei. Two were red, one was green, and the fourth had portions of both colors, indicating the presence of the translocation.  相似文献   
98.
Ingestion of small bones often causes oropharyngeal trauma. I present an unusual case of a potentially life-threatening haematoma of the soft palate caused by a chicken bone. To my knowledge, this is the only case reported in the English literature.  相似文献   
99.
100.
Infectious intracavernous carotid artery aneurysms usually present with ophthalmoplegia and/or signs of cavernous sinus thrombosis. We report an unusual case in which a patient with AIDS presented with intractable epistaxis secondary to rupture of a giant infectious intra-cavernous carotid artery aneurysm. Culture of the aneurysm grew mycobacterium avium intracellulare (MAI). The patient was treated successfully by excision of the aneurysm and reconstruction of the internal carotid artery with a saphenous vein interposition graft.  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