全文获取类型
收费全文 | 7272篇 |
免费 | 387篇 |
国内免费 | 79篇 |
专业分类
耳鼻咽喉 | 86篇 |
儿科学 | 62篇 |
妇产科学 | 128篇 |
基础医学 | 1181篇 |
口腔科学 | 178篇 |
临床医学 | 488篇 |
内科学 | 1337篇 |
皮肤病学 | 209篇 |
神经病学 | 482篇 |
特种医学 | 425篇 |
外科学 | 914篇 |
综合类 | 27篇 |
预防医学 | 237篇 |
眼科学 | 97篇 |
药学 | 966篇 |
中国医学 | 160篇 |
肿瘤学 | 761篇 |
出版年
2024年 | 4篇 |
2023年 | 47篇 |
2022年 | 169篇 |
2021年 | 277篇 |
2020年 | 122篇 |
2019年 | 147篇 |
2018年 | 228篇 |
2017年 | 155篇 |
2016年 | 271篇 |
2015年 | 416篇 |
2014年 | 412篇 |
2013年 | 487篇 |
2012年 | 808篇 |
2011年 | 710篇 |
2010年 | 408篇 |
2009年 | 338篇 |
2008年 | 445篇 |
2007年 | 354篇 |
2006年 | 338篇 |
2005年 | 364篇 |
2004年 | 305篇 |
2003年 | 227篇 |
2002年 | 181篇 |
2001年 | 106篇 |
2000年 | 104篇 |
1999年 | 70篇 |
1998年 | 29篇 |
1997年 | 32篇 |
1996年 | 23篇 |
1995年 | 14篇 |
1994年 | 16篇 |
1993年 | 8篇 |
1992年 | 14篇 |
1991年 | 25篇 |
1990年 | 13篇 |
1989年 | 10篇 |
1988年 | 13篇 |
1987年 | 9篇 |
1986年 | 8篇 |
1985年 | 7篇 |
1984年 | 3篇 |
1981年 | 4篇 |
1979年 | 3篇 |
1976年 | 2篇 |
1974年 | 1篇 |
1973年 | 1篇 |
1972年 | 1篇 |
1968年 | 1篇 |
1967年 | 1篇 |
1966年 | 2篇 |
排序方式: 共有7738条查询结果,搜索用时 15 毫秒
71.
72.
73.
Soo Jeong Yoon Young Cheol Yoon So Young Bae Joon Ho Wang 《Korean journal of radiology》2015,16(6):1313-1318
ObjectiveTo evaluate the correlation between bone tunnel diameter after anterior cruciate ligament (ACL) reconstruction measured by computed tomography (CT) using multiplanar reconstruction (MPR) and stability or clinical scores.ResultsThe tibial bone tunnels for the anteromedial bundles were significantly widened at T2 compared with T1 (observer 1, 0.578 mm to 0.698 mm, p value of < 0.001; observer 2, 0.581 mm to 0.707 mm, p value of < 0.001). There was no significant correlation between the diameter at T2 and stability or clinical scores and between the interval change ratio ([T2 - T1] / T1) and stability or clinical scores (corrected p values for all were 1.0). Intraobserver agreement for measurements was excellent (> 0.8) for both observers. Interobserver agreement for measurement was excellent (> 0.8) except for the most distal portion of the femoral bone tunnel for anterior medial bundle in immediate postoperative CT, which showed moderate agreement (concordance correlation coefficient = 0.6311).ConclusionNeither the diameter nor its change ratio during interval follow-up is correlated with stability or clinical scores. 相似文献
74.
TS Suhardja L Bae EZ Seah P Cashin DG Croagh 《Annals of the Royal College of Surgeons of England》2015,97(8):568-573
Introduction
The acute surgical model has been trialled in several institutions with mixed results. The aim of this study was to determine whether the acute surgical model provides better outcomes for patients with acute biliary presentation, compared with the traditional emergency surgery model of care.Methods
A retrospective review was carried out of patients who were admitted for management of acute biliary presentation, before and after the establishment of an acute surgical unit (ASU). Outcomes measured were time to operation, operating time, after-hours operation (6pm – 8am), length of stay and surgical complications.Results
A total of 342 patients presented with acute biliary symptoms and were managed operatively. The median time to operation was significantly reduced in the ASU group (32.4 vs 25.4 hours, p=0.047), as were the proportion of operations performed after hours (19.5% vs 2.5%, p<0.001) and the median length of stay (4 vs 3 days, p<0.001). The median operating time, rate of conversion to open cholecystectomy and wound infection rates remained similar.Conclusions
Implementation of an ASU can lead to objective differences in outcomes for patients who present with acute cholecystitis. In our study, the ASU significantly reduced time to operation, the number of operations performed after hours and length of stay. 相似文献75.
76.
77.
78.
79.
80.
Eun Joo Bae Bai Hui Chen Bing Chun Yan Bich Na Shin Jeong Hwi Cho In Hye Kim Ji Hyeon Ahn Jae Chul Lee Hyun-Jin Tae Seongkweon Hong Dong Won Kim Jun Hwi Cho Yun Lyul Lee Moo-Ho Won Joon Ha Park 《中国神经再生研究》2015,10(6):944-950
The tumor suppressor p63 is one of p53 family members and plays a vital role as a regulator of neuronal apoptosis in the development of the nervous system. However, the role of p63 in mature neuronal death has not been addressed yet. In this study, we first compared ischemia-induced effects on p63 expression in the hippocampal regions (CA1–3) between the young and adult gerbils subjected to 5 minutes of transient global cerebral ischemia. Neuronal death in the hippocampal CA1 region of young gerbils was significantly slow compared with that in the adult gerbils after transient global cerebral ischemia. p63 immunoreactivity in the hippocampal CA1 pyramidal neurons in the sham-operated young group was significantly low compared with that in the sham-operated adult group. p63 immunoreactivity was apparently changed in ischemic hippocampal CA1 pyramidal neurons in both ischemia-operated young and adult groups. In the ischemia-operated adult groups, p63 immunoreactivity in the hippocampal CA1 pyramidal neurons was significantly decreased at 4 days post-ischemia; however, p63 immunoreactivity in the ischemia-operated young group was significantly higher than that in the ischemia-operated adult group. At 7 days post-ischemia, p63 immunoreactivity was decreased in the hippocampal CA1 pyramidal neurons in both ischemia-operated young and adult groups. Change patterns of p63 level in the hippocampal CA1 region of adult and young gerbils after ischemic damage were similar to those observed in the immunohistochemical results. These findings indicate that higher and longer-term expression of p63 in the hippocampal CA1 region of the young gerbils after ischemia/reperfusion may be related to more delayed neuronal death compared to that in the adults. 相似文献