全文获取类型
收费全文 | 7233篇 |
免费 | 499篇 |
国内免费 | 43篇 |
专业分类
耳鼻咽喉 | 63篇 |
儿科学 | 173篇 |
妇产科学 | 104篇 |
基础医学 | 1081篇 |
口腔科学 | 124篇 |
临床医学 | 515篇 |
内科学 | 1573篇 |
皮肤病学 | 390篇 |
神经病学 | 524篇 |
特种医学 | 313篇 |
外科学 | 1175篇 |
综合类 | 156篇 |
一般理论 | 4篇 |
预防医学 | 362篇 |
眼科学 | 263篇 |
药学 | 326篇 |
中国医学 | 28篇 |
肿瘤学 | 601篇 |
出版年
2024年 | 8篇 |
2023年 | 52篇 |
2022年 | 87篇 |
2021年 | 203篇 |
2020年 | 137篇 |
2019年 | 175篇 |
2018年 | 195篇 |
2017年 | 167篇 |
2016年 | 218篇 |
2015年 | 235篇 |
2014年 | 331篇 |
2013年 | 304篇 |
2012年 | 555篇 |
2011年 | 515篇 |
2010年 | 283篇 |
2009年 | 263篇 |
2008年 | 387篇 |
2007年 | 367篇 |
2006年 | 335篇 |
2005年 | 389篇 |
2004年 | 330篇 |
2003年 | 270篇 |
2002年 | 303篇 |
2001年 | 236篇 |
2000年 | 224篇 |
1999年 | 180篇 |
1998年 | 68篇 |
1997年 | 49篇 |
1996年 | 48篇 |
1995年 | 47篇 |
1994年 | 38篇 |
1993年 | 25篇 |
1992年 | 78篇 |
1991年 | 76篇 |
1990年 | 71篇 |
1989年 | 80篇 |
1988年 | 91篇 |
1987年 | 64篇 |
1986年 | 50篇 |
1985年 | 44篇 |
1984年 | 35篇 |
1983年 | 39篇 |
1982年 | 7篇 |
1981年 | 10篇 |
1980年 | 6篇 |
1979年 | 24篇 |
1978年 | 10篇 |
1977年 | 16篇 |
1974年 | 9篇 |
1969年 | 6篇 |
排序方式: 共有7775条查询结果,搜索用时 15 毫秒
91.
Epistaxis: vascular anatomy, origins, and endovascular treatment 总被引:5,自引:0,他引:5
Embolization can play an important role in controlling epistaxis. However, one must be careful to avoid nontarget embolization via the dangerous anastomoses between the ECA branches, the carotid siphon, and ophthalmic arteries. 相似文献
92.
Brenner tumor of the ovary: CT and MR findings 总被引:4,自引:0,他引:4
Moon WJ Koh BH Kim SK Kim YS Rhim HC Cho OK Hahm CK Byun JY Cho KS Kim SH 《Journal of computer assisted tomography》2000,24(1):72-76
PURPOSE: The purpose of this study was to determine the CT and MR characteristics of Brenner tumors, rare epithelial neoplasms of the ovary. METHOD: CT and MR scans of eight pathologically proven Brenner tumors of the ovary (seven benign, one malignant, and one associated with mucinous cystadenoma) were retrospectively reviewed. The masses were analyzed for location, size, external configuration, internal architecture, enhancement pattern, presence of calcification, and metastatic spread. RESULTS: The patients' median age was 63 years (range 39-79 years), and the mean size of the tumors was 11.4 cm (7.5-17 cm). All tumors were unilateral and had a well-defined margin. The mass was mostly solid in three, mostly cystic in one, and "mixed" solid and cystic in four cases. The tumors with cystic components (n = 5) were mostly multilocular in appearance (n = 4). All the solid components showed mild homogeneous enhancement on postcontrast CT and MRI. Extensive amorphous calcification within the solid component on CT was seen in five of six cases (83%). No characteristic findings discriminating malignancy from benign Brenner tumor could be found. CONCLUSION: Extensive amorphous calcification in a solid mass or solid component in a multilocular cystic mass is a characteristic finding of Brenner tumor of the ovary on CT and MRI. 相似文献
93.
As a general rule, surgery, whenever possible followed by irradiation, is considered to be a standard treatment for pyriform sinus cancer. In early primary lesions, many different approaches have been tried for larynx preservation. From 1990-1997, 7 patients with pyriform sinus carcinoma without the involvement of pyriform sinus apex were treated with partial laryngopharyngectomy at the Asan Medical Center. Three patients were T1 stage and four were T2. All patients had nodal metastases and were treated with neck dissection and postoperative radiotherapy. Follow-up period was 1-8 years. One regional recurrence and one distant metastasis occurred; however, there was no recurrence at the primary site. The voices of all the patients were saved. The most uncomfortable postoperative symptom was mild aspiration. From these results, we can conclude that partial laryngopharyngectomy with neck dissection might be the favorable treatment modality for selected cases of pyriform sinus cancer. 相似文献
94.
95.
Soonjo Hwang Young Shin Kim Yun-Joo Koh Bennett L. Leventhal 《Journal of autism and developmental disorders》2018,48(1):225-238
While a growing number of studies indicate associations between experiences of bullying and autism spectrum disorder (ASD), it is not clear what roles comorbid behavioral problems may play. We investigated the experiences of children with ASD as victims and/or perpetrators of bullying. Children with ASD epidemiologically ascertained participated in a cross-sectional study. Although children with ASD showed significantly increased risk for bullying involvement compared to community children, after controlling for comorbid psychopathology and other demographic factors, increased risks for being perpetrators or victim-perpetrators disappeared while risk for being bullied/teased continued to be significantly elevated. This finding will help guide medical, educational and community personnel to effectively identify children with ASD at risk for school bullying and develop interventions. 相似文献
96.
97.
Yun-Hee Rhee Soo-Jin Jeong Hyo-Jeong Lee Hyo-Jung Lee Wonil Koh Ji Hoon Jung Sun-Hee Kim Kim Sung-Hoon 《BMC cancer》2012,12(1):28
Background
Ergosterol peroxide (EP) derived from edible mushroom has been shown to exert anti-tumor activity in several cancer cells. In the present study, anti-angiogenic activity of EP was investigated with the underlying molecular mechanisms in human multiple myeloma U266 cells. 相似文献98.
Young Kyung Sung Geum Youn Gwak Moon Seok Choi Kwang Chul Koh Seung Woon Paik Byung Chul Yoo Joon Hyeok Lee 《Gut and liver》2012,6(4):520-523
Intestinal bypass surgery, particularly jejuno-ileal bypass surgery, performed for the purpose of weight reduction may cause an unexpected exacerbation of nonalcoholic steatohepatitis (NASH). Here, we report a case of NASH caused by small intestinal bacterial overgrowth, which developed after jejuno-colic bypass surgery and resolved dramatically after surgical correction. 相似文献
99.
Joseph Jia Hong Toh Shanker Pasupathy Ruban A. L. Poopalalingam Mariko Siyue Koh 《Obesity surgery》2014,24(2):334-336
Obesity-associated severe asthma is a distinct phenotype characterised by resistance to standard asthma therapies. Bariatric surgery appears to be a viable alternative for those who have failed trials of traditional weight loss methods. However, anaesthetic and surgical risks are potential barriers. We describe three patients with treatment-resistant obesity-associated severe asthma who underwent bariatric surgery without complications due to the multidisciplinary perioperative planning and care involved in these complex cases. All three patients showed improvements in asthma control and reduction in maintenance medication use post-surgery. 相似文献
100.