全文获取类型
收费全文 | 554篇 |
免费 | 32篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 20篇 |
儿科学 | 52篇 |
妇产科学 | 8篇 |
基础医学 | 84篇 |
口腔科学 | 10篇 |
临床医学 | 73篇 |
内科学 | 88篇 |
皮肤病学 | 4篇 |
神经病学 | 12篇 |
特种医学 | 40篇 |
外科学 | 45篇 |
综合类 | 27篇 |
预防医学 | 40篇 |
眼科学 | 13篇 |
药学 | 29篇 |
中国医学 | 4篇 |
肿瘤学 | 38篇 |
出版年
2023年 | 3篇 |
2022年 | 2篇 |
2021年 | 11篇 |
2020年 | 7篇 |
2019年 | 13篇 |
2018年 | 5篇 |
2017年 | 7篇 |
2016年 | 6篇 |
2015年 | 10篇 |
2014年 | 27篇 |
2013年 | 34篇 |
2012年 | 33篇 |
2011年 | 25篇 |
2010年 | 21篇 |
2009年 | 20篇 |
2008年 | 14篇 |
2007年 | 21篇 |
2006年 | 19篇 |
2005年 | 12篇 |
2004年 | 14篇 |
2003年 | 19篇 |
2002年 | 11篇 |
2001年 | 17篇 |
2000年 | 16篇 |
1999年 | 14篇 |
1998年 | 18篇 |
1997年 | 22篇 |
1996年 | 17篇 |
1995年 | 12篇 |
1994年 | 10篇 |
1993年 | 13篇 |
1992年 | 2篇 |
1991年 | 6篇 |
1990年 | 10篇 |
1989年 | 8篇 |
1988年 | 5篇 |
1987年 | 3篇 |
1986年 | 6篇 |
1985年 | 5篇 |
1984年 | 6篇 |
1983年 | 2篇 |
1981年 | 2篇 |
1978年 | 3篇 |
1957年 | 2篇 |
1956年 | 2篇 |
1954年 | 3篇 |
1952年 | 16篇 |
1951年 | 23篇 |
1950年 | 2篇 |
1935年 | 1篇 |
排序方式: 共有587条查询结果,搜索用时 203 毫秒
21.
22.
23.
IA Maartens T Wassenberg FJ Halbertsma HAM Marres P Andriessen 《Acta paediatrica (Oslo, Norway : 1992)》2009,98(11):1852-1854
A case report is presented of a rapidly growing congenital nasopharyngeal teratoma (epignathus) in a preterm infant, leading to severe upper airway obstruction. Prenatal diagnosis by ultrasonography did not reveal the condition because the tumour masses were initially small and there was no polyhydramnios. Epignathus is a rare cause of upper airway obstruction of the newborn that can grow rapidly in the neonatal period and should be treated surgically.
Conclusion: Epignathus is a rare cause of upper airway obstruction of the newborn that can grow rapidly in the neonatal period. 相似文献
Conclusion: Epignathus is a rare cause of upper airway obstruction of the newborn that can grow rapidly in the neonatal period. 相似文献
24.
头孢克肟胶囊人体药动学研究及生物等效性评价 总被引:1,自引:0,他引:1
目的:研究头孢克肟胶囊在健康人体内的药动学及生物等效性。方法:以18名健康志愿者为试验对象,采用同体交叉试验方法,分别单剂量口服受试制剂或参比制剂各400mg,采用HPLC法测定血浆中药物浓度。结果:参比制剂和受试制剂的tmax分别为(3.39±0.50)和(3.39±0.50)h,cmax分别为(2.33±0.33)和(2.27±0.25)μg/mL,t1/2分别为(3.92±0.85)和(4.41±0.68)h,AUC0~16分别为(14.61±2.67)和(14.82±2.02)μg·h·mL^-1,AUC0~∞分别为(16.00±3.13)和(16.81±2.62)μg·h·mL^-1。结论:受试制剂与参比制剂生物等效,受试制剂的相对生物利用度为(98.69±13.13)%。 相似文献
25.
Atlanto-axial rotatory fixation (AARF) is an uncommon condition which is often missed at presentation because of its rarity and the relative subtlety of plain film X-ray findings, but early detection and appropriate management are vital for a cure. We describe three cases in which the use of spiral computed tomography scanning with 3D and sagittal reconstructions greatly aided diagnosis and management. The 3D images gave a more graphic picture of the overall alignment of the upper cervical spine and the skull base, while the sagittal reconstructions demonstrated the presence or absence of compensatory atlanto-occipital subluxation. The literature is briefly reviewed. 相似文献
26.
R A Shiels K R Peel H N MacDonald J Thorogood P J Robinson 《British journal of obstetrics and gynaecology》1985,92(4):407-412
Thirty patients, thought clinically to have ovarian tumours, were studied prospectively by pre-operative computed tomographic (CT) scans of the abdomen and pelvis. In six patients (20%) small metastases in mesentery, omentum and on subdiaphragmatic peritoneum were not detected by the scans. CT did not improve the accuracy of staging or assist the surgeons by drawing their attention to disease which they might otherwise have missed. Although CT gives an elegant demonstration of anatomy, it is not an alternative to extended laparotomy in patients with ovarian tumours. 相似文献
27.
28.
29.
30.
JA Batch HR Davies BA Evans IA Hughes MN Patterson 《Archives of disease in childhood》1993,68(4):453-457
The partial androgen insensitivity syndrome occurs in 46,XY subjects with phenotypes ranging from perineoscrotal hypospadias with cryptorchidism and micropenis (mild undervirilisation) to clitoromegaly and partial labial fusion (marked undervirilisation). Within an affected family, wide variation in the degree of genital ambiguity between individuals can be seen. Two cousins of a previously reported subject who had severe genital ambiguity and partial androgen insensitivity were investigated. Neither of the cousins had genital abnormalities as marked as the index case, who also had qualitatively abnormal androgen binding and two mutations of the androgen receptor gene. Despite marked phenotypic differences between the index case and his cousins, similar androgen binding and the same androgen receptor mutations were shown in the cousins. Furthermore, one of the androgen receptor gene mutations has been shown in the mother and sister of one of the boys indicating that they are carriers. Thus phenotypic variation in families affected by partial androgen insensitivity is dependent on factors other than abnormalities of the androgen receptor gene alone. Although carrier status in partial androgen insensitivity can be determined, the severity of genital abnormalities in an affected offspring cannot be reliably predicted. 相似文献