全文获取类型
收费全文 | 899723篇 |
免费 | 62272篇 |
国内免费 | 2332篇 |
专业分类
耳鼻咽喉 | 12474篇 |
儿科学 | 28677篇 |
妇产科学 | 26143篇 |
基础医学 | 126576篇 |
口腔科学 | 24686篇 |
临床医学 | 74749篇 |
内科学 | 183138篇 |
皮肤病学 | 18984篇 |
神经病学 | 71386篇 |
特种医学 | 36445篇 |
外国民族医学 | 336篇 |
外科学 | 142108篇 |
综合类 | 19029篇 |
一般理论 | 247篇 |
预防医学 | 64556篇 |
眼科学 | 20083篇 |
药学 | 63805篇 |
中国医学 | 1798篇 |
肿瘤学 | 49107篇 |
出版年
2018年 | 9048篇 |
2017年 | 7160篇 |
2016年 | 7674篇 |
2015年 | 8722篇 |
2014年 | 12367篇 |
2013年 | 19207篇 |
2012年 | 25649篇 |
2011年 | 27256篇 |
2010年 | 16572篇 |
2009年 | 15781篇 |
2008年 | 26125篇 |
2007年 | 27734篇 |
2006年 | 27914篇 |
2005年 | 27445篇 |
2004年 | 26291篇 |
2003年 | 25462篇 |
2002年 | 25053篇 |
2001年 | 41356篇 |
2000年 | 42551篇 |
1999年 | 36265篇 |
1998年 | 9966篇 |
1997年 | 9149篇 |
1996年 | 9082篇 |
1995年 | 8445篇 |
1994年 | 8081篇 |
1993年 | 7584篇 |
1992年 | 28200篇 |
1991年 | 26979篇 |
1990年 | 26408篇 |
1989年 | 25345篇 |
1988年 | 23553篇 |
1987年 | 23170篇 |
1986年 | 22250篇 |
1985年 | 21151篇 |
1984年 | 15806篇 |
1983年 | 13477篇 |
1982年 | 8087篇 |
1979年 | 14589篇 |
1978年 | 10209篇 |
1977年 | 8627篇 |
1976年 | 8147篇 |
1975年 | 8959篇 |
1974年 | 10697篇 |
1973年 | 10182篇 |
1972年 | 9661篇 |
1971年 | 8917篇 |
1970年 | 8584篇 |
1969年 | 8025篇 |
1968年 | 7684篇 |
1967年 | 7086篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
Effects of poor glucose handling on arterial stiffness and left ventricular mass in normal children.
AIM: Cardiovascular risk factors can be present in children and young adults. We previously found abnormal microvascular function in children who had glucose intolerance and insulin resistance. The aim of the present study was to investigate whether they also have abnormalities in left ventricular mass (LVM) and arterial stiffness. METHODS: We measured heart dimensions and LVM using echocardiography, and arterial stiffness using pulse wave analysis in 23 children with good glucose handling (postfeeding glucose: 3.9 to 5 mmol/L) and 21 with poor glucose handling (7.7 to 11.4 mmol/L). RESULTS: The time to pulse reflection was slightly shorter in the poorer glucose handlers (mean+/-SD: 143+/-10 vs 153+/-20 ms, P=0.04), suggestive of increased arterial stiffness. Also in this group, there were significant relationships between intraventricular septal thickness, blood pressure and body mass index, but not in the normal glucose handlers. CONCLUSIONS: We have found that normal children who are in the lowest quintile of glucose tolerance in comparison with their peers are exhibiting the first signs of arterial stiffening. In addition, we have seen the beginnings of a relationship between blood pressure, body mass index and left ventricular enlargement in this group. While these changes may not yet be clinically significant, their emergence might be further evidence of early predisposition to cardiovascular disease. 相似文献
92.
Lorusso F Kong D Jalil A. K. A A. AO 《世界核心医学期刊文摘》2006,2(6):25-26
目的:描述胚胎种植前遗传诊断在1例携带Ⅰ型白细胞黏附缺陷病(LAD-1)携带者并完成健康妊娠夫妇中的应用。设计:病例报道。机构:大学医院生殖中心。患者:1例男女双方都是LAD-1携带者的夫妇,女方CD18基因的外显子4携带有G400A置换,男方的外显子5携带有C562T置换。干预:标准体外受精(IVF)后第3天行卵裂期活检和分裂球遗传分析以检测2处突变以及21号染色体标记物。主要观察指标:1个未罹患LAD-1婴儿的出生。结果:得到15个卵母细胞,其中10个受精。8个胚胎适宜胚胎活组织检查。 相似文献
93.
Setting goals to maintain hope. 总被引:3,自引:0,他引:3
94.
95.
96.
F Lofaso F Nicot M Lejaille L Falaize A Louis A Clement J-C Raphael D Orlikowski B Fauroux 《The European respiratory journal》2006,27(5):980-982
Sniff nasal inspiratory pressure (SNIP) measurement is a volitional noninvasive assessment of inspiratory muscle strength. A maximum of 10 sniffs is generally used. The purpose of the present study was to investigate whether the maximum SNIP improved after the tenth sniff. In total, 20 healthy volunteers and 305 patients with various neuromuscular and lung diseases were encouraged to perform 40 and 20 sniffs, respectively. The best SNIP among the first 10 sniffs was lower than the best SNIP among the next 10 sniffs in the healthy volunteers and patients. The SNIP improvement after the twentieth sniff was marginal. In conclusion, a learning effect persists after the tenth sniff. The current authors suggest using 10 additional sniffs when the best result of the first 10 sniffs is slightly below normal, or when sniff nasal inspiratory pressure is used to monitor a progressive decline in inspiratory muscle strength. 相似文献
97.
98.
Bone stock preservation is crucial when performing total hip replacement in young patients. The aim is to save good bone stock
for a possible revision procedure. Furthermore, there is an increasing demand from young and active patients to receive a
new joint which allows a normal or nearly normal life style. With this in mind, we began, in 1993, to develop a new femoral
implant. The purpose of this ultra-short stem was a physiologic strain distribution on the proximal femur with a proximal
load transfer from the implant to the femoral bone. Main features were an almost complete absence of the diaphyseal portion
of the stem, a well defined lateral flare with load transfer on the lateral column of the femur, and a very high femoral neck
cut. These innovations resulted in a conservative implant on both the bone stock and the soft tissues. This implant, in the
first years, was recommended only for young and active patients. Over the last thirteen years, this project has undergone
several modifications but the basic principles of the implant have remained the same. In the present review, we present the
rationale, the surgical technique and the clinical and experimental results so far obtained with this implant. 相似文献
99.
100.