全文获取类型
收费全文 | 9832篇 |
免费 | 1006篇 |
国内免费 | 20篇 |
专业分类
耳鼻咽喉 | 177篇 |
儿科学 | 267篇 |
妇产科学 | 150篇 |
基础医学 | 1416篇 |
口腔科学 | 286篇 |
临床医学 | 1165篇 |
内科学 | 1932篇 |
皮肤病学 | 151篇 |
神经病学 | 660篇 |
特种医学 | 367篇 |
外国民族医学 | 1篇 |
外科学 | 1355篇 |
综合类 | 453篇 |
一般理论 | 6篇 |
预防医学 | 1094篇 |
眼科学 | 115篇 |
药学 | 687篇 |
1篇 | |
中国医学 | 3篇 |
肿瘤学 | 572篇 |
出版年
2022年 | 59篇 |
2021年 | 167篇 |
2020年 | 97篇 |
2019年 | 134篇 |
2018年 | 139篇 |
2017年 | 116篇 |
2016年 | 145篇 |
2015年 | 188篇 |
2014年 | 236篇 |
2013年 | 297篇 |
2012年 | 437篇 |
2011年 | 437篇 |
2010年 | 330篇 |
2009年 | 291篇 |
2008年 | 435篇 |
2007年 | 441篇 |
2006年 | 450篇 |
2005年 | 434篇 |
2004年 | 451篇 |
2003年 | 398篇 |
2002年 | 347篇 |
2001年 | 324篇 |
2000年 | 355篇 |
1999年 | 323篇 |
1998年 | 162篇 |
1997年 | 150篇 |
1996年 | 137篇 |
1995年 | 132篇 |
1994年 | 91篇 |
1993年 | 82篇 |
1992年 | 188篇 |
1991年 | 196篇 |
1990年 | 174篇 |
1989年 | 193篇 |
1988年 | 154篇 |
1987年 | 158篇 |
1986年 | 137篇 |
1985年 | 172篇 |
1984年 | 132篇 |
1983年 | 111篇 |
1982年 | 80篇 |
1981年 | 81篇 |
1979年 | 119篇 |
1978年 | 97篇 |
1976年 | 74篇 |
1975年 | 63篇 |
1974年 | 93篇 |
1973年 | 77篇 |
1971年 | 61篇 |
1970年 | 60篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
Votteler T. P. Lipsky K. 《世界核心医学期刊文摘》2006,2(2):31-31
背景/目的:从1978-2000年,有10对联体双胞胎成功接受了手术分离,结果14人存活。其中6对是因为他们的联体同胞死亡或濒临死亡而接受紧急分离手术。剩余的4对,每对至少一个同胞接受至少一次的急诊手术后,才接受联体分离手术。方法:对这一独特的队列进行包含6个项目的问卷调查。问题的设计是开放式的,为父母/家庭提供有关信息的最大机会。对每个家庭就相同的问题也进行了当面的问卷调查。医师询问了与身体健康和疾病相关的一些问题。而社会工作询问了与发育、教育、社会心理和家庭功能相关的问题。结果:前面提及的14人存活的双胞胎中,4人大学毕业,1人于1981年完成中学学业,剩余9人正在上学。14人在最初的手术后,还需要接受再次手术,尤其是需要矫正泌尿系统、畸形、神经外科和小儿外科的问题。结论:通过超声检查对联体双胎进行宫内诊断,可以使医师和胎儿父母在孕早期决定在终止妊娠时是进行双胎分离还是保全其中一个。这些病例报道通过描述14例手术存活的长期体格检查和心理学检查结果,为医师和父母在关键时刻做出决定提供了另外有助的依据。 相似文献
2.
3.
Acute gastrointestinal haemorrhage in anticoagulated patients: diagnoses and response to endoscopic treatment. 总被引:2,自引:0,他引:2 下载免费PDF全文
The underlying diagnosis and clinical course of 52 patients who presented with severe acute gastrointestinal haemorrhage while taking the anticoagulant warfarin is reviewed. A bleeding site was identified in 83% of cases, only slightly fewer than the 92% found in a control of group of 710 patients not taking warfarin who presented in the same four year period. The degree or duration of anticoagulation was unrelated to the frequency of establishing a diagnosis. The commonest diagnosis was peptic ulcer (25 cases) and endoscopic treatment by injection or heater probe was attempted in 23 of these. The outcome in this subgroup was compared with that in 50 closely matched control subjects who had similar risk factors for rebleeding from peptic ulcer. Permanent haemostasis was achieved in (91%) of the anticoagulated and in 92% of the control patients. There were no complications related to endoscopy. Patients who present with acute gastrointestinal haemorrhage while taking warfarin usually bleed from mucosal disease. They should be endoscoped after resuscitation and those with major bleeding from a peptic ulcer should be offered endoscopic treatment. 相似文献
4.
In 1985 an outbreak of ornithosis affected 13 of 80 (16%) workers in a duck-processing plant. New employees were three times more likely to become cases than established employees. The highest attack rate was in those on the production line. Following the outbreak, an occupational health scheme was set up to monitor the health of new recruits to the company. Serological evidence of recent infection was demonstrated in 18 of 37 (49%) new employees tested in the first 3 months of employment. Five (14%) also had clinical evidence of ornithosis. Veterinary investigation of the ducks demonstrated a high proportion with asymptomatic chlamydial infection. It is suggested that ornithosis may be more common in duck processors than is currently supposed. Strategies to reduce occupational risks are discussed. 相似文献
5.
Endoscopic balloon dilatation as a therapeutic option in the management of intestinal strictures resulting from Crohn's disease 总被引:5,自引:0,他引:5
Endoscopic balloon dilatation was undertaken in seven patients who presented with obstructive symptoms resulting from Crohn's disease. Five patients had strictures from recurrent disease at the site of an ileotransverse anastomosis, one had duodenal stenosis and one a colonic stricture. The procedures were performed under intravenous sedation on one to four occasions (median 2) and were uncomplicated. Sustained improvement over an 18-24-month follow-up period was achieved in five patients, but dilatation was unsuccessful in two cases. Endoscopic balloon dilatation is a safe and effective option in selected patients with intestinal strictures resulting from Crohn's disease and may overcome the need for surgery. 相似文献
6.
7.
H. Fjeldsøe-Nielsen M. Unemo H. Fredlund S. V. Hjorth L. M. Berthelsen H. M. Palmer A. Friis-Møller 《European journal of clinical microbiology & infectious diseases》2005,24(4):280-283
In the study presented here 26 recent Danish clinical isolates of prolyliminopeptidase (PIP)-negative Neisseria gonorrhoeae were phenotypically and genotypically characterized to investigate whether one or more PIP-negative strains are circulating in the Danish community. The profiles of these isolates were compared with those of three isolates from a recent outbreak of PIP-negative N. gonorrhoeae infection in the UK. Twenty-five of the Danish isolates and all three UK isolates had similar antibiograms and were designated serovar IB-4. Genotypic characterization by pulsed-field gel electrophoresis, porB1b gene sequencing, and opa-typing revealed that these isolates were indistinguishable or closely related. The results indicate that at least one PIP-negative N. gonorrhoeae strain is currently circulating in the Danish community, and this strain is indistinguishable from the one that caused an outbreak in the UK.An erratum to this article can be found at 相似文献
8.
Neal G Palmer James R Yacyshyn Herbert C Northcott Brian Nebbe Paul W Major 《American journal of orthodontics and dentofacial orthopedics》2005,128(2):163-167
INTRODUCTION: To plan for future acceptance and implementation of computer-related technology, it is necessary to understand orthodontists' current perceptions and attitudes toward emerging technologies. METHODS: An anonymous, self-administered, mail-out survey of Canadian orthodontists was conducted. The response rate was 45.6% (304/667). RESULTS: Most orthodontists indicated that computer technology could improve current practice efficiency and quality of patient care. Only 15% reported that digital models are quite or very useful; 73.6%, 69.1%, 55%, and 37.4% agreed or strongly agreed with using digital and electronic technology to consult with other dental specialists, other orthodontists, general dentists, and the public, respectively. Cost of the technology was reported as a significant or insurmountable obstacle by 54% of the respondents. Interprovincial legislation, unclear consultation remuneration guidelines, and lack of comfort with the technology were not perceived as significant obstacles. Only 36% reported security or privacy issues as a significant or insurmountable obstacle. CONCLUSIONS: Canadian orthodontists seem to view digital and electronic technology as useful and capable of improving their offices' efficiency and production. Although they are sensitive to some potential obstacles, they are willing to overcome these and incorporate the technology into their practices. 相似文献
9.
10.
Mario C. Petersen David A. Kube Frederick B. Palmer 《Journal of developmental and physical disabilities》2006,18(3):307-318
Objective: Evaluate a) the prevalence of developmental disabilities (DD) in children admitted to a general pediatrics inpatient unit, and b) the number of children admitted to the unit with previously undiagnosed developmental disability. Methods: Prevalence was evaluated through retrospective record review. Subjects: One hundred ninety children older than five months of age admitted to a general pediatric unit. Results: Of 190 children admitted, 155 (81.6%) had adequate developmental screening documented in the record. Forty-nine (25.7% of total, 31.6% of screened) had a developmental disability, 22 (12.1% of total, 14.8% of screened) had a previously unrecognized disability. Sample prevalence of DD was: cerebral palsy (6.8%), developmental delay or mental retardation (8.4%), language delay (4.6%), learning disability (8.2%), and hearing loss (1.5%). New diagnoses included: three children with probable mental retardation (MR), nine with learning disability (may include mild MR), seven with language delay, three with abnormal motor skills (fine and/or gross motor), one each of: neurofibromatosis type I, hearing loss, cerebral palsy, dysphagia. Some children had more than one new diagnosis. Conclusion: The prevalence of disabilities in a general pediatrics inpatient unit is much higher than the prevalence in the community. Because almost half of the disabilities were previously unrecognized, acute hospitalization is an excellent opportunity to conduct developmental screening. 相似文献