全文获取类型
收费全文 | 2651篇 |
免费 | 157篇 |
国内免费 | 13篇 |
专业分类
耳鼻咽喉 | 18篇 |
儿科学 | 152篇 |
妇产科学 | 50篇 |
基础医学 | 348篇 |
口腔科学 | 76篇 |
临床医学 | 170篇 |
内科学 | 462篇 |
皮肤病学 | 24篇 |
神经病学 | 169篇 |
特种医学 | 84篇 |
外科学 | 289篇 |
综合类 | 79篇 |
预防医学 | 154篇 |
眼科学 | 171篇 |
药学 | 344篇 |
中国医学 | 55篇 |
肿瘤学 | 176篇 |
出版年
2023年 | 19篇 |
2022年 | 44篇 |
2021年 | 106篇 |
2020年 | 55篇 |
2019年 | 77篇 |
2018年 | 88篇 |
2017年 | 54篇 |
2016年 | 91篇 |
2015年 | 79篇 |
2014年 | 129篇 |
2013年 | 122篇 |
2012年 | 208篇 |
2011年 | 216篇 |
2010年 | 124篇 |
2009年 | 92篇 |
2008年 | 152篇 |
2007年 | 134篇 |
2006年 | 129篇 |
2005年 | 99篇 |
2004年 | 94篇 |
2003年 | 90篇 |
2002年 | 80篇 |
2001年 | 39篇 |
2000年 | 38篇 |
1999年 | 24篇 |
1998年 | 21篇 |
1997年 | 21篇 |
1996年 | 13篇 |
1995年 | 7篇 |
1994年 | 7篇 |
1993年 | 9篇 |
1992年 | 40篇 |
1991年 | 34篇 |
1990年 | 23篇 |
1989年 | 35篇 |
1988年 | 23篇 |
1987年 | 18篇 |
1986年 | 13篇 |
1985年 | 13篇 |
1984年 | 24篇 |
1983年 | 14篇 |
1980年 | 8篇 |
1979年 | 17篇 |
1976年 | 10篇 |
1975年 | 9篇 |
1974年 | 11篇 |
1973年 | 13篇 |
1972年 | 12篇 |
1971年 | 9篇 |
1969年 | 9篇 |
排序方式: 共有2821条查询结果,搜索用时 41 毫秒
21.
Sarin H Nigam S Chaturvedi UK Tripathi V Raj A 《Indian journal of pathology & microbiology》2003,46(1):97-99
A rare case of malignant nasal paraganglioma is described. A 30 year old female patient presented with a one year history of bilateralnasal obstruction, nasal deformity and recurrent epistaxis. CT scan demonstrated an enhancing mass occupying both nasal cavities, right maxillary antrum and anterior ethmoid sinus. Histopathologic diagnosis was malignant paraganglioma. A total maxillectomy with excision of growth was performed. Post-operative radiotherapy and chemotherapy was given but patient expired before the completion of therapy. Nose being a rare site for paragangliomas, these lesions present a diagnostic challenge to histopathologists and clinicians alike. A review of the four previously described malignant nasal paragangliomas is also presented. 相似文献
22.
Anuraag Shrivastav Shailly Varma Anurag Saxena John DeCoteau Rajendra K Sharma 《Journal of translational medicine》2007,5(1):58-6
Background
Colon cancer is the second leading cause of cancer deaths in the western world. If detected early, colorectal cancer is one of the most treatable forms of cancer. Unfortunately, very few people are screened. N-myristoyltransferase (NMT) catalyzes myristoylation of various proteins including oncoproteins. We have demonstrated earlier the alteration of NMT activity during the progression of colorectal cancer and established NMT as a putative therapeutic target for cancer. 相似文献23.
24.
25.
26.
27.
28.
29.
S K Kabra Y Jain R M Pandey T MadhulikaSinghal P Tripathi S Broor P Seth V Seth 《Transactions of the Royal Society of Tropical Medicine and Hygiene》1999,93(3):294-298
An epidemic of dengue haemorrhagic fever (DHF) occurred in Delhi in 1996. A total of 240 children between the age of 4 months to 13 years of either sex, admitted in one hospital, were evaluated. Two hundred and sixteen (90%) children were from Delhi. A clinical diagnosis of dengue fever (DF) was made in 25 (10%), dengue fever with unusual bleeding (DFB) in 22 (9%), DHF in 80 (33%) and dengue shock syndrome (DSS) in 113 (47%) of the children strictly according to the WHO classification. The age peaked at 8 years. There was no association between various grades of severity of illness and age-groups though girls suffered from more severe illness. No association between severity of malnutrition and severity of illness was observed. Tourniquet test was positive in 40% with DF, 18% with DFB, 62% with DHF and 64% with DSS. In DSS haematemesis was present in 55 (49%), epistaxis in 39 (35%), melaena in 27 (24%) and ecchymosis in 34 (30%) patients. Children diagnosed as DFB had haematemesis and epistaxis in 12 (55%) and 10 (45%) respectively. Intravenous fluid requirement was clearly less in DFB patients than in DHF/DSS patients. Unusual clinical features in the form of jaundice were present in 7 (6%), hepatic encephalopathy in 6 (5%) and dengue encephalopathy in 6 (5%) patients. Dengue 2 virus was isolated from 10 of the 50 patients for whom viral culture was done on C6/36 clone of Aedes albopictus cell line. Eighteen patients suffering from DSS died giving an overall case fatality of 7.5%. The mortality rate in DHF/DSS was 9.3%. It is further suggested that DFB is a distinct entity. Most patients could be classified by the WHO classification if a retrospective packed cell volume was used to assess haemoconcentration. We suggest that development of area-specific criteria for diagnosis and management is desirable. 相似文献
30.