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   935篇
  免费   47篇
耳鼻咽喉   9篇
儿科学   103篇
妇产科学   11篇
基础医学   59篇
口腔科学   27篇
临床医学   45篇
内科学   113篇
皮肤病学   14篇
神经病学   15篇
特种医学   66篇
外科学   301篇
综合类   28篇
预防医学   62篇
眼科学   26篇
药学   42篇
中国医学   3篇
肿瘤学   58篇
  2023年   5篇
  2022年   12篇
  2021年   12篇
  2020年   10篇
  2019年   17篇
  2018年   23篇
  2017年   23篇
  2016年   14篇
  2015年   15篇
  2014年   74篇
  2013年   59篇
  2012年   87篇
  2011年   82篇
  2010年   36篇
  2009年   24篇
  2008年   31篇
  2007年   45篇
  2006年   33篇
  2005年   35篇
  2004年   33篇
  2003年   30篇
  2002年   27篇
  2001年   25篇
  2000年   25篇
  1999年   11篇
  1998年   13篇
  1997年   7篇
  1996年   8篇
  1995年   5篇
  1994年   5篇
  1993年   3篇
  1992年   12篇
  1991年   6篇
  1990年   13篇
  1989年   10篇
  1988年   15篇
  1987年   6篇
  1986年   4篇
  1985年   3篇
  1983年   4篇
  1980年   3篇
  1979年   3篇
  1977年   3篇
  1974年   7篇
  1973年   5篇
  1972年   9篇
  1970年   8篇
  1969年   8篇
  1967年   8篇
  1966年   7篇
排序方式: 共有982条查询结果,搜索用时 15 毫秒
1.
2.
3.
Twenty-four cases of trichotillomania attending psychiatry outpatient department and child guidance clinic at Kalawati Saran Children's and Smt Sucheta Kriplani Hospitals over a period of 2 years from July, 1985 to November 1987 were studied. Females (66.7%) outnumbered the males (33.3%). Majority of cases belonged to age group 6-10 years (54.2%) and nuclear family (68.5%). Nail-biting (25.0%) was the commonest associated neurotic trait, followed by enuresis (20.9%), temper-tantrum (12.5%), etc. A past history of hysterical fits and neurotic depression was found in 3 cases (12.5%) and 2 cases (8.3%) respectively. Family history of neurosis was seen in mothers and fathers of 20.9% and 12.5% cases respectively. Trichobezoars and trichophytobezoars were found in 6 cases (25.0%) and 3 cases (12.5%) respectively. Majority of patients of trichobezoars presented with vague complaints like heaviness in the stomach (55.6%), inability to gain weight (44.4%), etc, while 22.2% cases were asymptomatic and detected only on screening.  相似文献   
4.
A 50-year old male presented with swollen right eyelids, bleeding per nostrils and a vague left post-auricular swelling for 4 months. Posterior rhinoscopy revealed one pinkish polypoidal mass in the posterior nare and roof of nasopharynx. FNAC from the post-auricular swelling suggested metastatic undifferentiated carcinoma. Incisional biopsy was done form the nasopharynx and histopathological examination proved it to be a malignant paraganglioma. The case is reported for its rarity.  相似文献   
5.
The Indian population can be divided broadly into Dravidians and the Aryans. In this report, we have attempted to analyze the HLA genetic profile of 400 native North Indian Hindus of Aryan descent. The gene frequencies of a majority of class I and II antigens show similarity to the Caucasoid population. An interesting finding was a complete lack of antigen B14 while B16 and B41 occurred with the least frequency. Haplotype A10, B8 with significant positive linkage disequilibrium as well as showing the highest incidence is characteristic of North Indians.  相似文献   
6.
The presence of lymphocytotoxic antibodies (LCA) and their association with HLA haplotypes has been studied in 27 multi-case rheumatoid arthritis (RA) families (13 multiplex and 14 simplex) in Northern India. Of the total 59 RA patients, 69.4% had cytotoxins in their sera as compared with 2.5% of healthy controls. No differences were observed in the frequency of LCA in relation to sex and rheumatoid factor. LCA against B cells were significantly more predominant than those against T cells. Twenty families studied for correlation of HLA with LCA showed greater intensity of reaction with DR4+ haplotypes, particularly in simplex families. Similarly, the frequency of LCA among patients and unaffected parents was greater in simplex compared with multiplex families. Haplotype sharing with the patient was increased in the relatives positive for cytotoxins in these families. An immunogenetic contribution made by the affected parent and a common environmental stimulus may be responsible for the increased production of LCA in multi-case families with RA.  相似文献   
7.
Here 15 cases of advanced Juvenile angiofibroma are presented. Advantages of wide tumour exposure and preoperative embolization are discussed.  相似文献   
8.
Here we present 10 cases of rhinocerebral aspergillosis. In this study we included only invasive type of cases. In 4 of these disease had extended into the brain parenchyma and in remaining cases diseases had extended intracranially but dura was not invaded. Details about the operative procedure and followup is presented. Till date only 3 of these cases are surviving.  相似文献   
9.
The purpose of the present study was to analyze the microbiological profile of cases of keratitis following trauma with vegetative matter in a tertiary care center. A retrospective review of the medical records of 49 patients with keratitis following vegetative matter injury over a 3-month period was performed. All patients underwent corneal scraping for smears and inoculation onto various culture media. The microbiological profile was based on the smear and culture reports. For patients who were culture-negative, outcome after standard empirical antibacterial therapy as per hospital protocol was analyzed. Thirteen patients with corneal ulcers had fungal etiology, eight had bacterial etiology, and two had protozoal etiology, while 13 patients were polymicrobial and 13 were culture-negative. Polymicrobial infections were mainly bacterial (eight cases), and the remaining five cases had coexistent fungal and bacterial etiology. The treatment was directed to the specific organism and patients improved with medical or surgical therapy. Only a third of culture-negative cases showed fungal etiology on biopsy or histopathology after keratoplasty while a third showed improvement with therapy. Corneal infections following vegetative matter trauma show a varied etiological profile; however, bacterial and polymicrobial infections are more prevalent. Empirical anti-fungal therapy, as commonly practiced, must be avoided in cases with vegetative matter injury.  相似文献   
10.
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