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   922篇
  免费   57篇
  国内免费   21篇
耳鼻咽喉   4篇
儿科学   78篇
妇产科学   9篇
基础医学   126篇
口腔科学   29篇
临床医学   158篇
内科学   222篇
皮肤病学   5篇
神经病学   23篇
特种医学   158篇
外科学   61篇
综合类   26篇
预防医学   33篇
眼科学   5篇
药学   28篇
肿瘤学   35篇
  2023年   6篇
  2022年   5篇
  2021年   15篇
  2020年   4篇
  2019年   4篇
  2018年   7篇
  2017年   8篇
  2016年   9篇
  2015年   6篇
  2014年   21篇
  2013年   32篇
  2012年   21篇
  2011年   25篇
  2010年   30篇
  2009年   56篇
  2008年   30篇
  2007年   36篇
  2006年   26篇
  2005年   25篇
  2004年   20篇
  2003年   18篇
  2002年   28篇
  2001年   28篇
  2000年   25篇
  1999年   31篇
  1998年   44篇
  1997年   48篇
  1996年   46篇
  1995年   39篇
  1994年   24篇
  1993年   29篇
  1992年   12篇
  1991年   13篇
  1990年   13篇
  1989年   28篇
  1988年   27篇
  1987年   22篇
  1986年   10篇
  1985年   19篇
  1984年   10篇
  1983年   13篇
  1982年   19篇
  1981年   12篇
  1980年   17篇
  1979年   6篇
  1978年   8篇
  1977年   11篇
  1976年   7篇
  1975年   4篇
  1966年   1篇
排序方式: 共有1000条查询结果,搜索用时 15 毫秒
1.
Summary: A female patient with isovaleric acidaemia had a successful outcome from pregnancy.  相似文献   
2.
3.
Coronary artery bypass grafts: visualization with MR imaging   总被引:1,自引:0,他引:1  
Gomes  AS; Lois  JF; Drinkwater  DC  Jr; Corday  SR 《Radiology》1987,162(1):175
  相似文献   
4.
Hysterosalpingography was performed in 31 patients by means of a low-dose scanning-beam digital radiographic system. The technique permits adequate evaluation of gynecologic abnormalities while allowing significant reduction in radiation: 2.4-mR (6.1 X 10(-7) C/kg) exposure to the skin and 0.7-mrad (7 X 10(-6) Gy) mean dose to the ovaries per image obtained. Sixteen patients demonstrated readily recognizable and documented abnormalities, corroborated by laparoscopy, laparotomy, or other supportive evidence.  相似文献   
5.
BACKGROUND: Merkel cell carcinoma is a rare malignant neuroendocrine neoplasm characteristically arising from the dermis of sunlight-exposed skin. It rarely arises outside the skin. OBJECTIVE: We present a patient with primary Merkel cell carcinoma arising from subcutaneous fat, with no involvement of the overlying skin. We describe the clinical manifestations and magnetic resonance imaging (MRI) findings. METHODS: We report a 63-year-old woman with a primary lesion of Merkel cell carcinoma that arose from the subcutaneous fat layer of the left arm. The lesion presented as a subcutaneous nodule with intact overlying skin. MRI showed that the nodular lesion was located entirely in the subcutaneous fat layer, with no involvement of the dermis. Peritumoral infiltration around the lesion and enlarged lymph nodes deep to the lesion were noted. The patient received wide excision of the lesion with dissection of the regional lymph nodes and adjuvant radiotherapy and chemotherapy. RESULTS: Histopathologic examination confirmed the diagnosis of Merkel cell carcinoma with local lymphatic metastasis, and the lesion was completely located in the subcutaneous fat, with no involvement of the dermis. These findings were well correlated with MRI findings. CONCLUSION: Primary Merkel cell carcinoma may arise from the subcutaneous fat and present as an entirely subcutaneous lesion with intact skin. MRI is helpful to evaluate the local extension of the lesion and regional lymphatic metastasis.  相似文献   
6.
7.
表小檗碱对α受体的作用   总被引:2,自引:0,他引:2  
王嘉陵  方达超 《药学学报》1990,25(4):289-292
表小檗碱(epiberberine,EB)是从湖北产黄连(Coptis chinensis Franch)中提取的一种生物碱,属苯喹嗪类原小檗碱,对其药理作用的研究资料甚少,未见其对α肾上腺素体作用的报道。资料表明,许多原小檗碱类化合物有α受体阻滞作用,为从该类化合物中选择  相似文献   
8.
The purpose of this pilot study was to observe both relaxed and deep breathing patterns in a convenience sample to determine the incidence of normal versus faulty patterns of respiration. These observations were then combined with respondent answers to a survey on pain history to determine if there is any correlation between faulty breathing and musculo-skeletal pain patterns. If such a correlation can be made, then we propose that clinicians working with chronic pain patients may have improved outcomes if they address and correct faulty breathing patterns. Based on this study, it is suggested to include the evaluation and treatment of faulty respiration in the rehabilitation of chronic musculo-skeletal conditions, most notably cervical pain.  相似文献   
9.
    
Summary We describe a cohort of 14 Hurler–Scheie patients homozygous for the p.Leu490Pro missense mutation in the α-l-iduronidase gene. Now based in the UK, they are all of Pakistani/Kashmiri descent; 64% were female; 11/14 (79%) had a sibling or cousin with MPS I and the parents are consanguineous in all cases. The median age at diagnosis was 1.8 years (range from antenatal diagnosis to 16.5 years). Twelve were on ERT with recombinant human α-l-iduronidase (IDUA; Laronidase, Genzyme) for a median duration of 22.5 months (range 2–71 months) and median age at commencement of ERT was 8.6 years (range 0.4–23.1 years). There was clear improvement in the size of liver and spleen as well as reduction in urine glycosaminoglycans (GAGs). The mean (range) urine GAG levels in mg/mmol creatinine were 63.4 (28.9–105.6), 28.3 (10.9–41.4), 22.8 (12.1–43.1), 15.7 (9.2–24.8) and 16.3 (10.1–21.0) at commencement, 3 months post ERT, 6 months post ERT, 12 months post ERT and 24 months post ERT, respectively. Effects on growth were not clear as there does not seem to be an obvious trend of increase or decrease in height after commencement of ERT and this seems to be the case regardless of the age at which ERT was started. Electronic Supplementary Material The online version of this article (doi:) contains supplementary material, which is available to authorized users. Online citation: JIMD Short Report #059 (2007) Online  相似文献   
10.
36例踝关节骨折合并下胫腓联合分离的治疗体会   总被引:1,自引:1,他引:0  
李得春 《医学争鸣》2005,26(17):1631-1631
0 引言 踝关节骨折是临床上较常见的关节内骨折,包含了腓骨骨折,内踝骨折,后踝骨折和下胫腓联合的损伤. 处理不当可导致踝穴的变形,下胫腓联合分离后期出现创伤性关节炎.  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