全文获取类型
收费全文 | 853篇 |
免费 | 93篇 |
国内免费 | 20篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 27篇 |
妇产科学 | 4篇 |
基础医学 | 113篇 |
口腔科学 | 38篇 |
临床医学 | 81篇 |
内科学 | 231篇 |
皮肤病学 | 9篇 |
神经病学 | 30篇 |
特种医学 | 159篇 |
外科学 | 45篇 |
综合类 | 15篇 |
一般理论 | 1篇 |
预防医学 | 45篇 |
眼科学 | 87篇 |
药学 | 46篇 |
2篇 | |
中国医学 | 1篇 |
肿瘤学 | 31篇 |
出版年
2019年 | 8篇 |
2018年 | 15篇 |
2017年 | 11篇 |
2016年 | 9篇 |
2015年 | 16篇 |
2014年 | 14篇 |
2013年 | 14篇 |
2012年 | 22篇 |
2011年 | 21篇 |
2010年 | 11篇 |
2009年 | 19篇 |
2008年 | 26篇 |
2007年 | 30篇 |
2006年 | 33篇 |
2005年 | 31篇 |
2004年 | 22篇 |
2003年 | 33篇 |
2002年 | 27篇 |
2001年 | 17篇 |
2000年 | 21篇 |
1999年 | 23篇 |
1998年 | 33篇 |
1997年 | 30篇 |
1996年 | 37篇 |
1995年 | 29篇 |
1994年 | 28篇 |
1993年 | 30篇 |
1992年 | 16篇 |
1991年 | 16篇 |
1990年 | 12篇 |
1989年 | 38篇 |
1988年 | 23篇 |
1987年 | 29篇 |
1986年 | 23篇 |
1985年 | 31篇 |
1984年 | 15篇 |
1983年 | 14篇 |
1982年 | 8篇 |
1981年 | 9篇 |
1980年 | 12篇 |
1979年 | 11篇 |
1978年 | 10篇 |
1977年 | 17篇 |
1976年 | 11篇 |
1974年 | 5篇 |
1972年 | 5篇 |
1971年 | 6篇 |
1970年 | 5篇 |
1968年 | 7篇 |
1967年 | 5篇 |
排序方式: 共有966条查询结果,搜索用时 31 毫秒
1.
2.
V Allen PhD DW Ryan MB FRCA A Murray PhD FIPSM 《International journal of clinical practice》1994,48(3):125-129
SUMMARY Four specialised air mattresses had interface pressure measured under six body sites prone to pressure sores in 10 subjects, supine and sitting. The mattresses were the Clinirest (SSI) and FirstStep (KCI) continuous airflow mattress overlays, and Airwave (Pegasus) and Nimbus (Huntleigh) alternating pressure air mattresses. On the mattress overlays, average supine interface pressures were 2.33 kPa (scapula), 4.15 kPa (elbow), 1.94 kPa (sacrum) and 2.79 kPa (buttock), although they were higher at the occiput (7.97 kPa) and heel (11.7 kPa). The alternating pressure air mattresses had an average minimum interface pressure close to zero for three sites, rising to 4.28 kPa under the heel. Average maximum interface pressures were 8.61 kPa (occiput), 5.21 kPa (scapula), 4.90 (elbow), 4.85 kPa (sacrum), 4.61 kPa (buttock) and 13.2 kPa (heel). No accepted scientific method exists for comparing the two types of mattress. Our data suggest a clinical benefit at the occiput and heel (supine) in using an alternating pressure air mattress and a benefit in using a continuous airflow mattress overlay at other sites. 相似文献
3.
4.
D R Turner E A Haan E Jacka R S Kalucy R J Burns J O Willoughby R Crabb 《The Medical journal of Australia》1988,148(11):567, 570-567, 573
The discovery of a fragment of DNA that is linked closely to the Huntington's-disease autosomal locus offers the opportunity for the presymptomatic diagnosis of this dominantly-inherited neurodegenerative disorder. Presymptomatic testing will present individuals and society with difficult choices and responsibilities. A pilot adult presymptomatic test programme is under way for SA families. Presymptomatic testing requires intensive counselling both before and after the test. A form of prenatal test, which is applicable to a significant proportion of couples with one partner at risk of Huntington's disease, is available also. As this form of prenatal test does not change the risk status of the parent, less extensive counselling is required and testing is available nationally through the SA programme. It is anticipated that other states will develop their own diagnostic programmes in the near future. This article explains the basis for the test, its accuracy and the importance of obtaining DNA from key individuals in pedigrees of Huntington's disease. 相似文献
5.
Eleven radiologists appointed by the major radiological societies participated for the past 5 years in the development of the Health Policy Agenda for the American People. The Agenda is an action plan to address a wide variety of serious problems in medicine. The first phase involved establishment of 159 principles, broad value statements that were the foundation of the project. Phase 2 involved the development of policy proposals on 38 urgent issues for action in medical science; education; health resources; delivery mechanisms; evaluation, assessment, and control; and payment for services. These proposals are summarized in this report. The activities and recommendations of representatives for the field of radiology are described. The Agenda has been released, and an implementation phase has begun. It will likely be of great importance to the practice of radiology over the next decade. Important issues can be addressed by acting with the coalitions that are being formed from among the more than 150 participating organizations. 相似文献
6.
Two groups of nine-year-old children were examined for orthodontic problems using a Severity Index. Patients who had been referred by general dental practitioners to a Consultant Orthodontist had significantly more occlusal problems than the controls. Seventy-one per cent of the referred patients were assessed as needing immediate treatment. The results of this study cast doubt upon the need for routine screening of nine-year-olds in an area where the general dental service is efficiently run and has good liaison with the District Hospital. 相似文献
7.
8.
9.
10.