全文获取类型
收费全文 | 1079篇 |
免费 | 87篇 |
国内免费 | 5篇 |
专业分类
耳鼻咽喉 | 16篇 |
儿科学 | 62篇 |
妇产科学 | 41篇 |
基础医学 | 122篇 |
口腔科学 | 32篇 |
临床医学 | 103篇 |
内科学 | 206篇 |
皮肤病学 | 20篇 |
神经病学 | 138篇 |
特种医学 | 88篇 |
外科学 | 82篇 |
综合类 | 17篇 |
预防医学 | 64篇 |
眼科学 | 58篇 |
药学 | 88篇 |
肿瘤学 | 34篇 |
出版年
2024年 | 4篇 |
2023年 | 6篇 |
2022年 | 21篇 |
2021年 | 12篇 |
2020年 | 7篇 |
2019年 | 21篇 |
2018年 | 15篇 |
2017年 | 9篇 |
2016年 | 17篇 |
2015年 | 24篇 |
2014年 | 31篇 |
2013年 | 40篇 |
2012年 | 42篇 |
2011年 | 43篇 |
2010年 | 54篇 |
2009年 | 39篇 |
2008年 | 46篇 |
2007年 | 37篇 |
2006年 | 49篇 |
2005年 | 47篇 |
2004年 | 35篇 |
2003年 | 37篇 |
2002年 | 43篇 |
2001年 | 26篇 |
2000年 | 38篇 |
1999年 | 29篇 |
1998年 | 36篇 |
1997年 | 38篇 |
1996年 | 36篇 |
1995年 | 31篇 |
1994年 | 28篇 |
1993年 | 23篇 |
1992年 | 15篇 |
1991年 | 17篇 |
1990年 | 8篇 |
1989年 | 19篇 |
1988年 | 23篇 |
1987年 | 18篇 |
1986年 | 17篇 |
1985年 | 12篇 |
1984年 | 11篇 |
1983年 | 6篇 |
1982年 | 10篇 |
1981年 | 12篇 |
1980年 | 5篇 |
1978年 | 3篇 |
1977年 | 6篇 |
1976年 | 5篇 |
1974年 | 4篇 |
1969年 | 3篇 |
排序方式: 共有1171条查询结果,搜索用时 15 毫秒
21.
22.
Carta A Ferrigno L Salvo M Bianchi-Marzoli S Boschi A Carta F 《Journal of neurology, neurosurgery, and psychiatry》2003,74(2):246-248
OBJECTIVE: To investigate a possible correlation between final visual acuity and the presence at baseline of various systemic and local (orbital/ocular) signs in patients affected by indirect traumatic optic neuropathy. METHODS: 35 cases of traumatic optic neuropathy were examined retrospectively and 13 variables were tested. Univariate analysis with "no recovery of visual acuity" as the primary outcome was performed. Relative risk (RR) and 95% confidence intervals (CI) were calculated. Fisher's exact test was used for two variables to test differences between proportions. RESULTS: Four variables showed a significantly increased risk for no recovery of visual acuity: presence of blood within the posterior ethmoidal cells (RR = 2.25, 95% CI 1.25 to 4.04); age over 40 years (RR = 1.79, 1.07 to 2.99); loss of consciousness associated with traumatic optic neuropathy (RR = 2.21, 1.17 to 4.16); and absence of recovery after 48 hours of steroid treatment (p < 0.01, Fisher's exact test). Recovery documented at the first follow up visit after treatment was significantly associated with recovery at the last follow up visit (p < 0.01, Fisher's exact test). CONCLUSIONS: These four negative prognostic signs in patients affected by traumatic optic neuropathy may be useful in predicting the visual outcome in patients developing visual loss after head trauma and in deciding on the need for surgical treatment. 相似文献
23.
24.
25.
Urinary incontinence is a frequent functional disease affecting 5% to 25% of women. It is commonly believed that urinary stress incontinence (USI) is caused by anatomical defects, thus it can be treated by restoring anatomy. More than 100 surgical techniques have been proposed for genuine stress incontinence treatment. The tension free vaginal tape procedure (TVT) for the treatment of genuine IUS in women was first reported in 1996 by Ulmsten et al. The purpose of this study was to evaluate objective and subjective efficacy of the TVT procedure in different types of female urinary incontinence. From February 2000 to December 2001, 52 patients with urinary incontinence underwent the TVT procedure in the Obstetric and Gynecology Department of Avezzano Hospital, Italy. No difference in the cure rates was found between patients undergoing the TVT alone or associated with anterior and/or posterior colporrhaphy. In accordance with many authors we can affirm that the TVT sling technique is easy to use, the time for surgery is relatively short, and the procedure is free of complications and provides a satisfactory outcome. 相似文献
26.
KP Morris JR Skinner C Wren S Hunter MG Coulthard 《Archives of disease in childhood》1993,68(5):637-643
Thirteen anaemic children on dialysis were assessed to determine the incidence of cardiac changes in end stage renal failure. Nine children had an increased cardiothoracic ratio on radiography. The electrocardiogram was abnormal in every case but no child had left ventricular hypertrophy as assessed by voltage criteria. However, left ventricular hypertrophy, often gross, was found on echocardiography in 12 children and affected the interventricular septum disproportionately. Cardiac index was increased in 10 patients as a result of an increased left ventricular stroke volume rather than heart rate. Left ventricular hypertrophy was significantly greater in those on treatment for hypertension and in those with the highest cardiac index. Abnormal diastolic ventricular function was found in 6/11 children. Children with end stage renal failure have significant cardiac abnormalities that are likely to contribute to the high cardiovascular mortality in this group. Anaemia and hypertension, or its treatment, probably contribute to these changes. Voltage criteria on electrocardiogram are of no value in detecting left ventricular hypertrophy. Echocardiography must be performed, with the results corrected for age and surface area, in order to detect and follow these abnormalities. 相似文献
27.
M Stronati MG Revello RM Cerbo M Furione G Rondini G Gerna 《Acta paediatrica (Oslo, Norway : 1992)》1995,84(3):340-341
28.
Carta MG Hardoy MC Boi MF Mariotti S Carpiniello B Usai P 《Journal of psychosomatic research》2002,53(3):789-793
OBJECTIVE: To evaluate the association between celiac disease and specific anxiety and depressive disorders and to identify potential common pathogenetic links, with particular regard to thyroid function and autoimmunity. METHODS: Cases included 36 adult celiac patients, 25 females and 11 males, aged 18-64 years. Controls comprised 144 healthy subjects matched by sex and age with no clinical evidence or family history of celiac disease. Diagnosis of celiac disease was made on the basis of clinical history and serological criteria. Psychiatric diagnoses were formulated using the International Composite Diagnostic Interview, according to DSM-IV criteria. Thyroid was evaluated by palpation, echography and measurement of serum-free thyroid hormones (FT4, FT3), thyroid-stimulating hormone (TSH) and antithyroid autoantibodies (anti-TPO). RESULTS: Compared to controls, a significantly higher number of celiac patients met criteria for lifetime [15 (41.7%) versus 30 (29.8%), P < .01] and 6-month [7 (19.4%) versus 9 (6.2%), OR = 3.2, chi(2) = 5.2, P < .05] major depressive disorder (MDD) and lifetime [5 (13.9%) versus 3 (2.1%), P < .001] and 6-month [3 (8.1%) versus 2 (1.4%), P < .05] panic disorder (PD). Anti-TPO prevalence was significantly higher in celiac patients than in the control group (11/36 = 30.5% versus 14/144 = 9.7%, P < .001). A higher frequency of PD and MDD was found in celiac patients with positive anti-TPO when compared to negative anti-TPO patients (4/11 = 36.4% PD in TPO+ versus 1/25 = 4% PD in TPO-, P < .01; 9/11 = 81.8% MD in TPO+ versus 6/25 = 9.5% MD in TPO-, P < .01). CONCLUSION: Patients affected by celiac disease tend to show a high prevalence of PD and MDD and association with subclinical thyroid disease appears to represent a significant risk factor for these psychiatric disorders. 相似文献
29.
Screening for complement deficiency in bacterial meningitis 总被引:1,自引:0,他引:1
T Ernst PJ Späth C Aebi UB Schaad MG Bianchetti 《Acta paediatrica (Oslo, Norway : 1992)》1997,86(9):1009-1010
Seventy-seven children with bacterial meningitis were screened for complement deficiency. Both the classical and the alternate pathways were normal in 75 patients. Transiently reduced total haemolytic activity of the classical pathway was documented in a boy with meningococcal meningitis. Total haemolytic activity of both the classical and the alternate pathways were reduced in another patient with pneumococcal meningitis: individual complement components determination indicated predominant activation of the alternate pathway. 相似文献
30.
The clinical efficacy of oral levodopa methyl ester solution in reversing afternoon "off" periods in Parkinson's disease 总被引:1,自引:0,他引:1
M J Steiger F Stocchi A Carta S Ruggieri A Agnoli N P Quinn C D Marsden 《Clinical neuropharmacology》1991,14(3):241-244
We compared the efficacy of a single dose of an oral solution of levodopa methyl ester (ME) to that of standard levodopa, in the form of a single dose of Madopar, in reversing afternoon "off" periods in 12 patients with Parkinson's disease (PD). The highly soluble ME solution led to a significantly more rapid reversal of "off" periods. This preparation may therefore convey a clinical advantage in patients experiencing motor fluctuations whilst taking multiple daily dosages of levodopa, particularly in those with long or highly variable latency to the next "on" period. 相似文献