全文获取类型
收费全文 | 233706篇 |
免费 | 40253篇 |
国内免费 | 8847篇 |
专业分类
耳鼻咽喉 | 5849篇 |
儿科学 | 6231篇 |
妇产科学 | 3428篇 |
基础医学 | 13633篇 |
口腔科学 | 3113篇 |
临床医学 | 38191篇 |
内科学 | 59205篇 |
皮肤病学 | 8190篇 |
神经病学 | 19301篇 |
特种医学 | 9465篇 |
外国民族医学 | 61篇 |
外科学 | 48869篇 |
综合类 | 15320篇 |
现状与发展 | 103篇 |
一般理论 | 3篇 |
预防医学 | 11979篇 |
眼科学 | 5823篇 |
药学 | 9913篇 |
72篇 | |
中国医学 | 4894篇 |
肿瘤学 | 19163篇 |
出版年
2024年 | 700篇 |
2023年 | 6105篇 |
2022年 | 3766篇 |
2021年 | 7709篇 |
2020年 | 9427篇 |
2019年 | 5168篇 |
2018年 | 10390篇 |
2017年 | 10144篇 |
2016年 | 10925篇 |
2015年 | 12465篇 |
2014年 | 20285篇 |
2013年 | 19679篇 |
2012年 | 11649篇 |
2011年 | 12481篇 |
2010年 | 14534篇 |
2009年 | 17367篇 |
2008年 | 9859篇 |
2007年 | 8381篇 |
2006年 | 10780篇 |
2005年 | 8189篇 |
2004年 | 5715篇 |
2003年 | 4456篇 |
2002年 | 4210篇 |
2001年 | 5687篇 |
2000年 | 5138篇 |
1999年 | 5696篇 |
1998年 | 5280篇 |
1997年 | 5018篇 |
1996年 | 4564篇 |
1995年 | 4264篇 |
1994年 | 2828篇 |
1993年 | 2165篇 |
1992年 | 2083篇 |
1991年 | 2009篇 |
1990年 | 1603篇 |
1989年 | 1645篇 |
1988年 | 1404篇 |
1987年 | 1188篇 |
1986年 | 1127篇 |
1985年 | 900篇 |
1984年 | 635篇 |
1983年 | 593篇 |
1982年 | 552篇 |
1981年 | 437篇 |
1980年 | 383篇 |
1979年 | 336篇 |
1978年 | 328篇 |
1977年 | 396篇 |
1975年 | 277篇 |
1972年 | 279篇 |
排序方式: 共有10000条查询结果,搜索用时 343 毫秒
991.
992.
993.
994.
肝移植围手术期出凝血功能障碍的防治 总被引:3,自引:0,他引:3
目的 探讨肝移植围手术期出凝血功能障碍的防治。方法 回顾性分析我院 2 0 0 2年 6月~ 2 0 0 3年 12月施行的 6 1例肝移植病例。结果 6 1例肝移植术前肝功能ChildC级 35例 (5 7 4 % ) ,ChildB级 2 6例 (4 2 6 % ) ,ChildC组的患者术中凝血指标 (INR)的变化程度大于ChildB组 (P <0 0 5 )。与凝血有关的并发症中大出血 5例 (8 2 % ) ,肾衰 6例 (9 8% ) ,肝动脉血栓形成 5例 (8 2 % ) ,手术开展两阶段对比 ,第二阶段主要因限制了大量凝血药及血制品的使用 ,并发症明显减少。结论 掌握好不同时期、不同患者出血和血栓形成的平衡是防治肝移植围手术期出凝血功能障碍的关键 相似文献
995.
996.
Leonardo Bonilha MD PhD Paulien M. de Vries Diana J. Vincent MD PhD Chris Rorden MD PhD Paul S. Morgan Mark W. Hurd PhD Nada Besenski MD Kenneth J. Bergmann MD Vanessa K. Hinson MD PhD 《Movement disorders》2007,22(8):1110-1116
We investigated whether structural white matter abnormalities, in the form of disruption of axonal coherence and integrity as measured with diffusion tensor imaging (DTI), constitute an underlying pathological mechanism of idiopathic dystonia (ID), independent of genotype status. We studied seven subjects with ID: all had cervical dystonia as their main symptom (one patient also had spasmodic dysphonia and two patients had concurrent generalized dystonia, both DYT1‐negative). We compared DTI MR images of patients with 10 controls, evaluating differences in mean diffusivity (MD) and fractional anisotropy (FA). ID was associated with increased FA values in the thalamus and adjacent white matter, and in the white matter underlying the middle frontal gyrus. ID was also associated with increase in MD in adjacent white matter to the pallidum and putamen bilaterally, left caudate, and in subcortical hemispheric regions, including the postcentral gyrus. Abnormal FA and MD in patients with ID indicate that abnormal axonal coherence and integrity contribute to the pathophysiology of dystonia. These findings suggest that ID is not only a functional disorder, but also associated with structural brain changes. Impaired connectivity and disrupted flow of information may contribute to the impairment of motor planning and regulation in dystonia. © 2006 Movement Disorder Society 相似文献
997.
Severe hemorrhagic radiation proctitis advancing to gradual cessation with hyperbaric oxygen 总被引:3,自引:0,他引:3
Dr. Jacky Charneau MD Gilles Bouachour MD Bruno Person MD Pascal Burtin MD Jean Ronceray MD Jean Boyer MD 《Digestive diseases and sciences》1991,36(3):373-375
Summary We report a case of a male patient suffering from a severe hemorrhagic radiation proctitis which gradually ceased with hyperbaric oxygen. We discuss the mechanisms of chronic radiation injury and the effect of the hyperbaric oxygen. This therapy is proposed as an alternative to surgical intervention for this abnormality. 相似文献
998.
999.
W Zhou 《中华耳鼻咽喉科杂志》1991,26(5):297-8, 318
Thirty-one cases with hypopharyngeal carcinoma and 4 cases with esophageal carcinoma in cervical segment were treated surgically from April 1984 to April 1989. In 6 cases, while preserving the larynx, the hypopharynx and the esophagus were resected and reestablished by the colon. In 29 cases, total laryngectomy was also performed and 4 had their hypopharynx and esophagus substituted by the colon and 25 by the stomach. According to UICC (1982), there were 11 cases in stage II, 15 in stage III and 9 in stage IV. The mean 3-year and 5-year survival rates were 62% and 32% respectively. In fatal cases, 4 cases had recurrences at the site of pharyngeal anastomoses and 11 had metastases in the neck. 相似文献
1000.
Ryo Hattori MD Tateki Kubo MD Kenji Yano MD PhD Atsushi Tanemura MD Yuji Yamaguchi MD PhD Satoshi Itami MD PhD Ko Hosokawa MD PhD 《Dermatologic surgery》2003,29(10):1071-1072
BACKGROUND: Nevus lipomatosus cutaneous superficialis (NLCS) is a relatively rare condition. Although NLCS can affect any region of the entire body, no case of NLCS in the clitoris has ever been reported. OBJECTIVE: To report a case of NLCS of the clitoris that presented manifestations that were similar to female pseudohermaphrodism. METHODS: This is a case report and review of the literature. RESULTS: A congenital, soft, skin-colored lesion of the clitoris in a 1-year-old girl resembled female pseudohermaphrodism. It was resected, and the histologic diagnosis was NLCS. Postoperatively, there was no subsequent change in the lesion during the 3-year follow-up period. CONCLUSION: We reported a case of congenital solitary NLCS of the clitoris. Although NLCS might be a relatively rare condition, we should consider it in the differential diagnosis of female pseudohermaphrodism. 相似文献