全文获取类型
收费全文 | 42685篇 |
免费 | 5178篇 |
国内免费 | 175篇 |
专业分类
耳鼻咽喉 | 939篇 |
儿科学 | 1009篇 |
妇产科学 | 869篇 |
基础医学 | 4440篇 |
口腔科学 | 640篇 |
临床医学 | 7235篇 |
内科学 | 7925篇 |
皮肤病学 | 870篇 |
神经病学 | 3628篇 |
特种医学 | 1744篇 |
外科学 | 6566篇 |
综合类 | 1048篇 |
现状与发展 | 2篇 |
一般理论 | 39篇 |
预防医学 | 5039篇 |
眼科学 | 694篇 |
药学 | 2498篇 |
2篇 | |
中国医学 | 127篇 |
肿瘤学 | 2724篇 |
出版年
2023年 | 708篇 |
2022年 | 581篇 |
2021年 | 1343篇 |
2020年 | 1119篇 |
2019年 | 1170篇 |
2018年 | 1702篇 |
2017年 | 1327篇 |
2016年 | 1399篇 |
2015年 | 1554篇 |
2014年 | 1873篇 |
2013年 | 2804篇 |
2012年 | 2597篇 |
2011年 | 2515篇 |
2010年 | 1698篇 |
2009年 | 1649篇 |
2008年 | 1923篇 |
2007年 | 1884篇 |
2006年 | 1748篇 |
2005年 | 1575篇 |
2004年 | 1529篇 |
2003年 | 1199篇 |
2002年 | 1101篇 |
2001年 | 945篇 |
2000年 | 912篇 |
1999年 | 891篇 |
1998年 | 574篇 |
1997年 | 513篇 |
1996年 | 532篇 |
1995年 | 441篇 |
1994年 | 362篇 |
1993年 | 287篇 |
1992年 | 633篇 |
1991年 | 559篇 |
1990年 | 515篇 |
1989年 | 555篇 |
1988年 | 512篇 |
1987年 | 445篇 |
1986年 | 485篇 |
1985年 | 395篇 |
1984年 | 319篇 |
1983年 | 307篇 |
1982年 | 196篇 |
1981年 | 200篇 |
1980年 | 156篇 |
1979年 | 288篇 |
1978年 | 167篇 |
1977年 | 163篇 |
1974年 | 161篇 |
1973年 | 156篇 |
1971年 | 162篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.
The incidence of neural tube defects in a rural area of the west of Ireland from 1974 to 1985 was 2.96 per 1000. The prevalence was unchanged during the 11 years. When compared with a control group there was no increased incidence of anaemia in mothers of affected infants. 相似文献
23.
M R Garcia N D Ryan H Rabinovitch P Ambrosini J Twomey S Iyengar H Novacenko B Nelson J Puig-Antich 《Journal of the American Academy of Child and Adolescent Psychiatry》1991,30(3):398-406
In an effort to evaluate whether differences exist in the hypothalamic-pituitary-thyroid axis of depressed children, a thyrotropin releasing hormone (TRH) stimulation test was administered to 55 prepubertal subjects who were divided into three groups matched for age and sex: a depressed group (endogenous N = 15, nonendogenous N = 15), a psychiatric nondepressed control group (N = 16), and a normal control group (N = 9). Each subject was tested at two dosages of TRH, 2 micrograms/kg and 7 micrograms/kg. Increasing age and female sex were positively correlated with a greater thyroid stimulating hormone (TSH) response. TSH response to TRH was examined with subjects reclassified by severe suicidal ideation, severe aggression, and parental history of alcoholism. Results of this study are contrasted with the adult psychiatric literature. 相似文献
24.
R J Haddad S D Cook M R Brinker 《The Journal of bone and joint surgery. British volume》1990,72(1):2-8
We reviewed 134 primary noncemented porous-coated total hip replacements in 125 patients: 64 were DePuy AML prostheses, 20 were Howmedica PCA and 50 were Implant Technology LSF. The prostheses had been in situ for an average of 36 months, 40 months and 24 months respectively. The average pre-operative Harris hip scores were 38.2 for AML, 33.2 for PCA, and 41.0 for the LSF prostheses. The average postoperative scores were 80.7 for AML, 83.8 for the PCA, and 91.5 for LSF. Thigh or groin pain associated with the prosthesis was present in 30% of AML, 30% PCA and 8% of the LSF cases. The clinical and radiographic review showed better early results with the LSF prostheses than the others; this seemed to be related to the implant design, which provided improved initial stability and more physiological transfer of load. 相似文献
25.
26.
Joyce J. Fitzpatrick Sheila Ryan DeWitt Baldwin Roger Bulger Jean Johnson-Pawlson Christopher McLaughlin Maureen Kelley Leopold Selketr Bernardine Lacey Charlene Hanson Robin Harvan Patricia Hinton Walker David Sluyter Mary Joan Ladden Neal Vanselow 《Journal of Midwifery & Women's Health》1998,43(1):61-65
In 1995, the National League for Nursing commissioned a Panel on Interdisciplinary/Transdisciplinary Education. The focus of the Panel's work was to examine educational issues that transcend the health professions and to make recommendations for future implementation of an interdisciplinary approach to addressing them. This article is being simultaneously published by several professional journals. The goal is to seek as much feedback as possible. 相似文献
27.
CM Reid M. Nelson P. Beckinsale P. Ryan LMH Wing LJ Beilin MA Brown GLR Jennings CI Johnston J. Marley JJ McNeil TO Morgan J. Shaw ID Steven MJ West 《Clinical and experimental pharmacology & physiology》1997,24(5):370-373
1. The present study aimed to determine the feasibility of conducting a 5 year cardiovascular outcome trial of the treatment of 6000 elderly hypertensive patients in Australian general practices. 2. General practitioners (GPs) were invited to participate by mail and personal follow-up. Patient records were reviewed to identify subjects for a blood pressure (BP) screening programme. Blood pressure was measured on three occasions and eligible subjects were included if the average BP was 160 mmHg systolic or 90 mmHg diastolic if systolic BP was 140 mmHg. 3. Seven hundred and forty-one GPs were approached and 89 were enrolled in the study (12% of mail invites and 75% of those receiving a personal contact). In 16 practices where screening was completed, 82 000 records were reviewed to identify 4% patients eligible for screening. Twenty-two per cent of eligible subjects attended screening. Of 1938 subjects screened, 180 (9%) had BP 5=160/90 mmHg. Forty-seven percent of subjects (n = 916) were receiving antihypertensive therapy and 184 (20%) were withdrawn from therapy. One hundred and sixteen (63%) of these subjects had BP return to study entry levels within 6 weeks. Fifty-seven newly diagnosed and 81 previously treated subjects were randomized (7% of the screened population). 4. Based on the high participation rate of GPs, the response rate of patients to attend a BP screening programme and the 7% randomization to screening ratio for entry into the study, the ANBP2 pilot study has demonstrated that it is feasible to recruit subjects from Australian general practices to a cardiovascular outcome trial. 相似文献
28.
Hartley Dean MA PhD Keir Gale BA Roger Woods BA MA 《Health & social care in the community》1996,4(6):338-346
The new complaints procedures which local authority social services departments have been required to introduce represent an important mechanism for managing the change of culture associated with recent community care reforms. They also represent a new genre in mechanisms of redress for welfare recipients. This paper reports the findings of a study which has observed considerable diversity in the ways in which local authorities are interpreting the nature and purposes of the new procedures and, in particular, the functions of review panels established under those procedures. Variations in the composition of panels, in the style of review panel proceedings, in perceptions of the panels' powers, and in the ways that complaints and complainants are constituted are all discussed. Attention is drawn to four competing interpretations of the review panels' role and to the need for these to be clarified and prioritised. 相似文献
29.
30.