全文获取类型
收费全文 | 7737篇 |
免费 | 540篇 |
国内免费 | 30篇 |
专业分类
耳鼻咽喉 | 88篇 |
儿科学 | 282篇 |
妇产科学 | 226篇 |
基础医学 | 917篇 |
口腔科学 | 219篇 |
临床医学 | 912篇 |
内科学 | 1619篇 |
皮肤病学 | 148篇 |
神经病学 | 640篇 |
特种医学 | 782篇 |
外科学 | 888篇 |
综合类 | 159篇 |
一般理论 | 5篇 |
预防医学 | 507篇 |
眼科学 | 152篇 |
药学 | 467篇 |
中国医学 | 14篇 |
肿瘤学 | 282篇 |
出版年
2022年 | 40篇 |
2021年 | 76篇 |
2020年 | 76篇 |
2019年 | 114篇 |
2018年 | 135篇 |
2017年 | 111篇 |
2016年 | 123篇 |
2015年 | 115篇 |
2014年 | 173篇 |
2013年 | 263篇 |
2012年 | 290篇 |
2011年 | 354篇 |
2010年 | 244篇 |
2009年 | 195篇 |
2008年 | 310篇 |
2007年 | 289篇 |
2006年 | 327篇 |
2005年 | 318篇 |
2004年 | 283篇 |
2003年 | 247篇 |
2002年 | 262篇 |
2001年 | 230篇 |
2000年 | 249篇 |
1999年 | 194篇 |
1998年 | 180篇 |
1997年 | 167篇 |
1996年 | 188篇 |
1995年 | 139篇 |
1994年 | 116篇 |
1993年 | 100篇 |
1992年 | 134篇 |
1991年 | 159篇 |
1990年 | 150篇 |
1989年 | 178篇 |
1988年 | 146篇 |
1987年 | 163篇 |
1986年 | 167篇 |
1985年 | 153篇 |
1984年 | 107篇 |
1983年 | 105篇 |
1982年 | 83篇 |
1981年 | 56篇 |
1980年 | 75篇 |
1979年 | 72篇 |
1978年 | 60篇 |
1977年 | 60篇 |
1976年 | 53篇 |
1975年 | 56篇 |
1974年 | 43篇 |
1973年 | 40篇 |
排序方式: 共有8307条查询结果,搜索用时 15 毫秒
1.
2.
3.
Familial expansile osteolysis: a morphological, histomorphometric and serological study. 总被引:1,自引:0,他引:1
Biopsies from the diseased bones of patients with familial expansile osteolysis (FEO) were examined by light and electron microscopy. Focal concentrations of multinuclear osteoclasts were present, and these contained viral-like microcylindrical inclusions which appeared exclusive to their nuclei. No consistent relationship was found between osteoclast size and the number of osteoclast nuclei containing microcylindrical inclusions. Quantitative histomorphometry showed evidence of increased bone remodelling with high bone cell densities and a decrease of the reversal period in bone remodelling. The lesions contained prominent woven bone and fibrovascular tissue, together with mononuclear cells and adipocytes. Little bone was found in the most radiolucent lesions, which were almost totally occupied by adipocytes and fibrovascular tissue. Serology did not reveal any significant differences between the viral antibody titres of patients and their age- and sex-matched controls. The present study suggests that intranuclear viral-like microcylindrical inclusions of osteoclasts are not a specific feature of Paget's disease, and are found in other disorders of osteoclast function, including pycnodysostosis, osteopetrosis, giant cell tumours, and familial expansile osteolysis. 相似文献
4.
Glenn Roberts John Somers Jocelyn Dawe Rowena Passy Carly Mays Graham Carr David Shiers Jo Smith 《Early intervention in psychiatry》2007,1(2):168-176
Aims: On the Edge is a mental health education programme designed to support early intervention by increasing knowledge and understanding of early psychosis, reducing the stigma associated with mental health issues and improving awareness of avenues of help. The target audience was young people aged 14–22 years in schools and colleges. Methods: An interactive drama programme was developed through collaborative working across psychiatry, applied drama and those with direct experience of psychosis. A national tour engaged 2500 students in 71 performances that took place in 51 schools and colleges. The programme was evaluated against its aims with data collected both during and after the tour. Results: Quantitative and qualitative evaluation found significant gains with respect to all three aims. Thirty‐one schools developed supportive links with local mental health services. Conclusions: This programme shows the value and effectiveness of delivering health education on early psychosis through the medium of applied drama, and offers a model for a programme that can be incorporated into early intervention services. Lessons learned through delivering this programme are a valuable contribution towards future developments of mental health education programmes for schools. 相似文献
5.
JA HYEON KU CHEOL KWAK SEUNG-JUNE OH EUNSIK LEE SANG EUN LEE JAE-SEUNG PAICK 《International journal of urology》2004,11(7):489-493
BACKGROUND: Our aims in the present study were to estimate the influences of pain and urinary symptoms on quality of life, and to determine which of these two variables has the most predictive power with respect to quality of life in young men with chronic prostatitis-like symptoms. METHODS: Chronic prostatitis-like symptoms were measured by the National Institutes of Health-Chronic Prostatitis Symptom Index. Of the 28,841 men aged 20 years who lived in the study community, 18,495 men (a response rate 64.1%) agreed to participate in the study. A total of 1057 men who complained of symptoms indicative of chronic prostatitis were included in the study. The influences of pain and urinary symptoms on quality of life were determined using logistic regression analysis. The receiver operating characteristic (ROC) curve was used to estimate the predictive ability of each of these variables with respect to quality of life. RESULTS: Results from multivariate analysis showed that both pain and urinary symptoms were associated with an increased likelihood of impaired quality of life, although pain contributed more to a reduced quality of life than urinary symptoms. Relative to men who experienced mild pain, men who experienced moderate pain had a 3.9-fold risk of poor quality of life (odds ratio [OR], 3.87; 95% confidence interval [CI], 2.86-5.23; P < 0.001) and those who experienced severe pain had a 15.7-fold risk of reduced quality of life (OR, 15.68; 95% CI, 6.59-37.35; P < 0.001). Moderate urinary symptoms were associated with a 1.4-fold risk of bother (OR, 1.41; 95% CI, 1.01-1.99; P < 0.001) and severe urinary symptoms were associated with 2.4-fold risk (OR, 2.39; 95% CI, 1.37-4.12; P < 0.001), relative to mild urinary symptoms. Comparison of the effects of pain and urinary symptoms showed that pain severity had the most predictive power for bother, quality of life, and quality-of-life impact. The areas under the ROC curves for bother, quality of life, and quality-of-life impact were 71.3%, 69.3% and 72.5%, respectively. CONCLUSION: Urinary symptoms and pain might be associated with an increased likelihood of impaired quality of life in young men with chronic prostatitis-like symptoms. In addition, our findings suggest that pain severity is the most influential variable for determining quality of life in this population. 相似文献
6.
Lucinda G. Carr Yiling Xu Wei-Hsien Ho Howard J. Edenberg 《Alcoholism, clinical and experimental research》1989,13(4):594-596
All nine exons of the ADH2(3) allele, which encodes the human alcohol dehydrogenase beta 3 subunit, have been cloned and sequenced. Comparison of this sequence to the ADH2(1) nucleotide sequence revealed only a single difference that results in an amino acid change, thus proving that the significant kinetic differences between these two isozymes is due to the Cys for Arg substitution at position 369. There are also two silent polymorphisms, and two changes in noncoding regions. 相似文献
7.
Progressive peripheral cone dysfunction 总被引:1,自引:0,他引:1
A 22-year-old man had a three-year history of progressive day blindness, most notably peripherally, and denied difficulty with central vision or color vision. Visual function studies demonstrated a diffuse dysfunction of the photopic system and normal scotopic function. The central cone function, however, was essentially normal. Visual acuity was 20/20 in each eye, results on AO-HRR and Ishihara color plate testing were normal, color naming visual fields demonstrated color discrimination in the central 10 degrees, and foveal adaptation was normal. 相似文献
8.
9.
10.