全文获取类型
收费全文 | 5272篇 |
免费 | 515篇 |
国内免费 | 25篇 |
专业分类
耳鼻咽喉 | 99篇 |
儿科学 | 313篇 |
妇产科学 | 78篇 |
基础医学 | 700篇 |
口腔科学 | 86篇 |
临床医学 | 469篇 |
内科学 | 1089篇 |
皮肤病学 | 86篇 |
神经病学 | 240篇 |
特种医学 | 601篇 |
外科学 | 921篇 |
综合类 | 108篇 |
一般理论 | 5篇 |
预防医学 | 448篇 |
眼科学 | 24篇 |
药学 | 268篇 |
中国医学 | 4篇 |
肿瘤学 | 273篇 |
出版年
2021年 | 54篇 |
2020年 | 56篇 |
2019年 | 56篇 |
2018年 | 70篇 |
2017年 | 60篇 |
2016年 | 79篇 |
2015年 | 95篇 |
2014年 | 115篇 |
2013年 | 169篇 |
2012年 | 178篇 |
2011年 | 198篇 |
2010年 | 162篇 |
2009年 | 124篇 |
2008年 | 173篇 |
2007年 | 173篇 |
2006年 | 182篇 |
2005年 | 200篇 |
2004年 | 141篇 |
2003年 | 147篇 |
2002年 | 144篇 |
2001年 | 157篇 |
2000年 | 162篇 |
1999年 | 135篇 |
1998年 | 170篇 |
1997年 | 156篇 |
1996年 | 169篇 |
1995年 | 137篇 |
1994年 | 112篇 |
1993年 | 105篇 |
1992年 | 94篇 |
1991年 | 86篇 |
1990年 | 105篇 |
1989年 | 138篇 |
1988年 | 99篇 |
1987年 | 121篇 |
1986年 | 107篇 |
1985年 | 129篇 |
1984年 | 93篇 |
1983年 | 89篇 |
1982年 | 65篇 |
1981年 | 36篇 |
1980年 | 57篇 |
1979年 | 64篇 |
1978年 | 56篇 |
1977年 | 58篇 |
1976年 | 73篇 |
1975年 | 74篇 |
1974年 | 38篇 |
1973年 | 33篇 |
1971年 | 49篇 |
排序方式: 共有5812条查询结果,搜索用时 15 毫秒
1.
K. A. Harding M. E. Pushpanathan S. R. Whitworth S. Nanthakumar R. S. Bucks T. C. Skinner 《Diabetic medicine》2019,36(12):1600-1611
2.
Fatal and non-fatal stingray envenomation 总被引:2,自引:0,他引:2
A fatality occurred in a previously healthy 12-year-old boy after a penetrating chest injury from a stingray barb. The injury occurred under freak circumstances. Death was a result of cardiac tamponade which was secondary to venom-induced, localized myocardial necrosis and spontaneous perforation, six days after the direct penetration of the right ventricle by the barb. Three other cases of less serious stingray envenomation are described which illustrate the significant localized morbidity that may occur without immediate wound exploration and toilet after adequate anaesthesia. We also report a study of a series of 100 minor stingray envenomations which, when treated, resulted in no morbidity. It is possible that local infiltration with 1% plain lignocaine may have a direct counteraction against stingray venom that remains in the wound area. Stingray venom has insidious, but powerful, localized tissue necrosing properties in humans. 相似文献
3.
Michael Rosenzweig Martha Skinner Tatiana Prokaeva Roger Théberge Catherine Costello Brian M Drachman Lawreen H Connors 《Amyloid》2007,14(1):65-71
We report the identification of a new transthyretin (TTR) gene mutation and variant protein, Glu61Gly, in a 55-year-old man with progressive cardiomyopathy, mild peripheral neuropathy and bilateral carpal tunnel syndrome. A diagnosis of TTR-associated familial amyloidosis (ATTR) was considered after an endomyocardial biopsy revealed amyloid deposits in the heart of a patient who had no family history of amyloidosis and no evidence of a plasma cell dyscrasia. Serum screening for a TTR variant by isoelectric focusing (IEF) was positive and prompted further studies to identify the genetic abnormality and to characterize the amyloidogenic protein. Direct DNA sequence analysis of all four coding regions in the TTR gene demonstrated heterozygosity in exon 3. Near equal amounts of guanine (G) and adenine (A) were observed at the second base position of codon 61. The wild-type (GAG) and mutated (GGG) sequences found in codon 61 correspond to glutamic acid (Glu) and glycine (Gly) residues, amino acids which differ in mass by -72 Da. Mass spectrometric analyses of TTR immunoprecipitated from serum showed the presence of both wild-type and variant proteins. The observed mass results for the wild-type and variant proteins were consistent with the predicted values calculated from the genetic analysis data. 相似文献
4.
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
5.
6.
7.
One hundred one consecutive uncemented hip arthroplasties (87 patients) were analyzed radiographically at 1-year follow up to relate mechanical factors to hip pain as determined by clinical pain scores. The average area moment of inertia and flexural rigidity were greater for the bone than the metal prosthesis for each type of prosthesis (AML, HG, PCA). Normalization of the flexural rigidity ratio (bone to prosthesis) for patient weight yielded a Spearman correlation coefficient of 0.232, significant at P = .02, suggesting that both applied stress and bending stiffness have an effect on pain. No relationship was seen between pain and AP, or average gap between prostheses and bone. 相似文献
8.
A juvenile animal model has been developed to study the growth potential of ileum in the urinary tract. Patch ileocystoplasties of known surface area were constructed in dogs of Group 1. Nonrefluxing ileal nipple valves of known length were created to replace one ureter in dogs of Group 2. After the juvenile animals grew and at minimum doubled their weight, they were reoperated and augmentation surface areas were remeasured at various physiologic intravesical pressures. Nipple valve lengths were remeasured after cystograms ruled out reflux. Results show that the bowel augmentation and an identical control segment increased in surface area proportionate to animal growth and that hydrostatic dilation caused further surface area increase. Nipple valves did not grow and in fact shortened, but remained nonrefluxing. The conclusion is that in the pediatric population, consideration should be given to downscaling the size of bladder augmentations or diversions in anticipation of future bowel growth, but that one should not shorten the ileal nipple valves. 相似文献
9.
10.