全文获取类型
收费全文 | 2999篇 |
免费 | 297篇 |
国内免费 | 33篇 |
专业分类
耳鼻咽喉 | 72篇 |
儿科学 | 88篇 |
妇产科学 | 40篇 |
基础医学 | 223篇 |
口腔科学 | 144篇 |
临床医学 | 337篇 |
内科学 | 549篇 |
皮肤病学 | 132篇 |
神经病学 | 201篇 |
特种医学 | 162篇 |
外科学 | 706篇 |
综合类 | 134篇 |
现状与发展 | 30篇 |
预防医学 | 168篇 |
眼科学 | 36篇 |
药学 | 153篇 |
中国医学 | 11篇 |
肿瘤学 | 143篇 |
出版年
2024年 | 18篇 |
2023年 | 198篇 |
2022年 | 48篇 |
2021年 | 77篇 |
2020年 | 101篇 |
2019年 | 69篇 |
2018年 | 110篇 |
2017年 | 87篇 |
2016年 | 85篇 |
2015年 | 105篇 |
2014年 | 155篇 |
2013年 | 146篇 |
2012年 | 128篇 |
2011年 | 147篇 |
2010年 | 126篇 |
2009年 | 139篇 |
2008年 | 105篇 |
2007年 | 119篇 |
2006年 | 93篇 |
2005年 | 84篇 |
2004年 | 76篇 |
2003年 | 74篇 |
2002年 | 69篇 |
2001年 | 62篇 |
2000年 | 69篇 |
1999年 | 66篇 |
1998年 | 52篇 |
1997年 | 63篇 |
1996年 | 50篇 |
1995年 | 38篇 |
1994年 | 37篇 |
1993年 | 42篇 |
1992年 | 34篇 |
1991年 | 41篇 |
1990年 | 35篇 |
1989年 | 45篇 |
1988年 | 32篇 |
1987年 | 27篇 |
1986年 | 30篇 |
1985年 | 30篇 |
1984年 | 22篇 |
1983年 | 12篇 |
1982年 | 18篇 |
1981年 | 13篇 |
1980年 | 17篇 |
1978年 | 11篇 |
1976年 | 19篇 |
1975年 | 15篇 |
1974年 | 19篇 |
1973年 | 10篇 |
排序方式: 共有3329条查询结果,搜索用时 31 毫秒
1.
2.
A mixed‐method study of effects of a therapeutic play intervention for children on parental anxiety and parents' perceptions of the intervention 下载免费PDF全文
3.
Oxybutynin versus propantheline in patients with multiple sclerosis and detrusor hyperreflexia 总被引:2,自引:0,他引:2
Hyperreflexia is the most common urological finding in patients with multiple sclerosis. A prospective randomized study was done to compare the effectiveness of 2 commonly used drugs, oxybutynin and propantheline. Of the 34 patients entered into the trial 19 were treated with oxybutynin and 15 with propantheline. The urological symptoms (frequency, nocturia, hesitancy, urgency and urge incontinence) were graded according to severity from 0 to 3. Patients with urinary infection were excluded. Urodynamic examination, consisting of cystometrography and electromyography, was performed in all patients before treatment. Both groups of patients had comparable neurological, urological and urodynamic status before treatment. In 4 patients (21 per cent) treated with oxybutynin and in 4 (27 per cent) treated with propantheline side effects were so severe that the treatment had to be discontinued. Symptomatic response to oxybutynin was good in 10 patients (67 per cent), fair in 2 (13 per cent) and poor in 3 (20 per cent). Propantheline produced good symptomatic results in 4 patients (36 per cent), fair in 1 (9 per cent) and poor in 6 (55 per cent). The mean increase in maximum cystometric capacity on cystometrography was significantly larger in the oxybutynin group than in the propantheline group (144 +/- 115 versus 35 +/- 101). Our results indicate that oxybutynin is more effective than propantheline in the treatment of detrusor hyperreflexia in patients with multiple sclerosis. 相似文献
4.
Hysterosalpingography was performed in 31 patients by means of a low-dose scanning-beam digital radiographic system. The technique permits adequate evaluation of gynecologic abnormalities while allowing significant reduction in radiation: 2.4-mR (6.1 X 10(-7) C/kg) exposure to the skin and 0.7-mrad (7 X 10(-6) Gy) mean dose to the ovaries per image obtained. Sixteen patients demonstrated readily recognizable and documented abnormalities, corroborated by laparoscopy, laparotomy, or other supportive evidence. 相似文献
5.
6.
7.
M A Gabal Y L Awad M B Morcos A M Barakat G Malik 《Veterinary and human toxicology》1986,28(3):207-212
Mycotoxicoses involving horses, rabbits and cattle have been studied. Fusarium tricinctum and T-2 toxin were isolated from all incriminated feedstuffs. Other isolated trichothecenes from the feed included HT-2, verrucarins and roridin. The toxins were separated, identified and quantitated using thin-layer chromatography, gas-liquid chromatography and mass spectrometry. T-2 toxin was detected in amounts varying from 0.5-204 ppm. The contaminated feedstuffs in connection with the affected horses and rabbits, included cereal grains (corn, cornstalks, bran and barley), whereas fescue hay was associated with the mucocutaneous findings in the bovine episode. The effects of the toxin(s) seemed to be host specific and varied according to the different animal species. Horses and rabbits developed primarily central nervous disorders with conspicuous pathological findings in the brain. Hepatitis and nephritis were also seen in naturally intoxicated horses and experimentally fed rats. Affected cattle developed mucocutaneous eruptions around the mouth and nostrils. In addition, dermonecrotic findings were observed involving the extremities, ear and tail. Fusariotoxicoses are toxic conditions of farm animals and man caused by the ingestion of cereal grains and forages contaminated by different fungal species of the genus Fusarium. A variety of clinical and pathological findings have been reported (5,6,10,13,15,17,31). This study concerns neuropathic findings in horses and rabbits and mucocutaneous lesions in cattle in association with T-2 toxin contamination. 相似文献
8.
We investigated the contribution of mechanical and sympathetic neural factors to proximal urethral sphincter dysfunction in the cat after chronic sacral rhizotomy. Concomitant vesicostomy prevented a decrease in the urethral pressure profile measured three months post-rhizotomy. Sympathetic influences on basal urethral perfusion pressure were the same in neurally-intact and chronic rhizotomised cats. A significant prazosin-sensitive component of basal urethral perfusion pressure remained after section of all extrinsic urethral innervation in both neurally-intact and chronic cats. Local intra-arterial 6-hydroxydopamine also abolished this component. After rhizotomy, noradrenaline content in the proximal urethra was significantly increased but there was no change in sensitivity to sympathetic stimulation. A small (5% of control) atropine-sensitive and prazosin-resistant constriction was seen only after chronic sacral rhizotomy. We conclude that a mechanical factor associated with bladder expression and not an alteration in sympathetic control is the major factor leading to diminished proximal urethral closure after vesicourethral lower motor neuron lesion. Furthermore, short adrenergic neurons have an important role in the maintenance of urethral pressure in the normal state and after lower motor neuron lesion. 相似文献
9.
10.