全文获取类型
收费全文 | 2111篇 |
免费 | 115篇 |
国内免费 | 15篇 |
专业分类
耳鼻咽喉 | 88篇 |
儿科学 | 12篇 |
妇产科学 | 47篇 |
基础医学 | 328篇 |
口腔科学 | 35篇 |
临床医学 | 167篇 |
内科学 | 256篇 |
皮肤病学 | 137篇 |
神经病学 | 242篇 |
特种医学 | 95篇 |
外科学 | 292篇 |
综合类 | 7篇 |
预防医学 | 83篇 |
眼科学 | 69篇 |
药学 | 138篇 |
中国医学 | 14篇 |
肿瘤学 | 231篇 |
出版年
2023年 | 17篇 |
2022年 | 48篇 |
2021年 | 52篇 |
2020年 | 34篇 |
2019年 | 63篇 |
2018年 | 49篇 |
2017年 | 63篇 |
2016年 | 72篇 |
2015年 | 123篇 |
2014年 | 117篇 |
2013年 | 146篇 |
2012年 | 169篇 |
2011年 | 174篇 |
2010年 | 95篇 |
2009年 | 102篇 |
2008年 | 146篇 |
2007年 | 113篇 |
2006年 | 122篇 |
2005年 | 100篇 |
2004年 | 86篇 |
2003年 | 59篇 |
2002年 | 44篇 |
2001年 | 37篇 |
2000年 | 46篇 |
1999年 | 29篇 |
1998年 | 9篇 |
1997年 | 8篇 |
1996年 | 7篇 |
1995年 | 2篇 |
1994年 | 6篇 |
1993年 | 5篇 |
1992年 | 12篇 |
1991年 | 14篇 |
1990年 | 15篇 |
1989年 | 11篇 |
1988年 | 7篇 |
1987年 | 5篇 |
1986年 | 3篇 |
1984年 | 1篇 |
1983年 | 2篇 |
1981年 | 2篇 |
1980年 | 1篇 |
1979年 | 3篇 |
1975年 | 3篇 |
1974年 | 6篇 |
1973年 | 7篇 |
1972年 | 2篇 |
1971年 | 1篇 |
1968年 | 1篇 |
1964年 | 1篇 |
排序方式: 共有2241条查询结果,搜索用时 15 毫秒
61.
62.
Seo SW Lee JH Jang SM Kim ST Chin J Kim GH Kim JH Roh JH Kim MJ Kim SH Na DL 《Archives of gerontology and geriatrics》2012,54(1):192-196
The neurochemical alterations in the entorhinal cortex have not yet been measured, even though the entorhinal cortex is the earliest involved brain region in aMCI. In this study, we investigated whether brain regions including the entorhinal cortex would show early involvement of neurochemical abnormalities in aMCI, and whether magnetic resonance spectroscopy (MRS) abnormalities might be a predictive marker of conversion of aMCI to Alzheimer's disease (AD). MRS was performed on 13 aMCI patients and 11 patients with no cognitive impairment (NCI). Localizing voxels were placed within the entorhinal cortex, hippocampus, posterior cingulate gyrus, and occipital white matter in the dominant hemisphere. N-acetyl aspartate/creatinine (NAA/Cr) ratios in the entorhinal cortex were significantly lower in aMCI patients than in NCI subjects. After a three-year follow-up, seven aMCI patients converted to AD and six remained stable. Baseline NAA/Cr ratios of entorhinal cortex were decreased in converters, compared to NCI. Our study suggested the entorhinal cortex is the earliest site that is subject to neurochemical alteration in aMCI patients, and baseline MRS metabolite ratios in the entorhinal cortex can be a marker for predicting conversion of aMCI to AD. 相似文献
63.
64.
65.
Sang?Yeob?Lee Yong?Min?Jo Won?Tae?Chung Sung?Hyun?Kim Seung?Young?Kim Mee?Sook?Roh Sung?Won?LeeEmail author 《Rheumatology international》2012,32(4):1065-1068
Kaposi sarcoma (KS) is a vascular neoplasm mainly affecting the skin of the limbs that has previously been associated with
rheumatoid arthritis (RA). When compared with the RA patients treated with corticosteroids and immunosuppressive drugs, the
reported number of KS in RA patients was very rare. Although the exact mechanisms of developing KS in RA patients are unclear,
some drugs which include corticosteroid have been suggested as an etiological factor in previous case reports of RA and KS.
We report, here in, another case of KS associated with the initiation of leflunomide in a patient with RA. 相似文献
66.
67.
68.
Seung Won Choi Han Yu Seong Sung Woo Roh 《Journal of Korean Neurosurgical Society》2013,54(4):355-358
Spinal extradural arachnoid cyst (SEAC) is a rare disease and uncommon cause of compressive myelopathy. The etiology remains still unclear. We experienced 2 cases of SEACs and reviewed the cases and previous literatures. A 59-year-old man complained of both leg radiating pain and paresthesia for 4 years. His MRI showed an extradural cyst from T12 to L3 and we performed cyst fenestration and repaired the dural defect with tailored laminectomy. Another 51-year-old female patient visited our clinical with left buttock pain and paresthesia for 3 years. A large extradural cyst was found at T1-L2 level on MRI and a communication between the cyst and subarachnoid space was illustrated by CT-myelography. We performed cyst fenestration with primary repair of dural defect. Both patients'' symptoms gradually subsided and follow up images taken 1-2 months postoperatively showed nearly disappeared cysts. There has been no documented recurrence in these two cases so far. Tailored laminotomy with cyst fenestration can be a safe and effective alternative choice in treating SEACs compared to traditional complete resection of cyst wall with multi-level laminectomy. 相似文献
69.
70.
Judy C. Pang Rebecca M. Minter Richard S. Kwon Diane M. Simeone Michael H. Roh 《Journal of gastrointestinal surgery》2013,17(3):501-510