全文获取类型
收费全文 | 3220785篇 |
免费 | 234073篇 |
国内免费 | 7157篇 |
专业分类
耳鼻咽喉 | 43968篇 |
儿科学 | 104689篇 |
妇产科学 | 87301篇 |
基础医学 | 471323篇 |
口腔科学 | 89809篇 |
临床医学 | 300786篇 |
内科学 | 616174篇 |
皮肤病学 | 68840篇 |
神经病学 | 259271篇 |
特种医学 | 118732篇 |
外国民族医学 | 811篇 |
外科学 | 472179篇 |
综合类 | 70055篇 |
现状与发展 | 13篇 |
一般理论 | 1262篇 |
预防医学 | 262953篇 |
眼科学 | 74318篇 |
药学 | 239124篇 |
16篇 | |
中国医学 | 6834篇 |
肿瘤学 | 173557篇 |
出版年
2021年 | 26006篇 |
2019年 | 26932篇 |
2018年 | 37323篇 |
2017年 | 28112篇 |
2016年 | 31080篇 |
2015年 | 35303篇 |
2014年 | 49432篇 |
2013年 | 75466篇 |
2012年 | 103416篇 |
2011年 | 110203篇 |
2010年 | 65211篇 |
2009年 | 60911篇 |
2008年 | 102543篇 |
2007年 | 109053篇 |
2006年 | 109948篇 |
2005年 | 106446篇 |
2004年 | 101589篇 |
2003年 | 97477篇 |
2002年 | 94223篇 |
2001年 | 142657篇 |
2000年 | 146627篇 |
1999年 | 123502篇 |
1998年 | 36709篇 |
1997年 | 32268篇 |
1996年 | 32268篇 |
1995年 | 30550篇 |
1994年 | 28334篇 |
1993年 | 26658篇 |
1992年 | 96936篇 |
1991年 | 95115篇 |
1990年 | 92531篇 |
1989年 | 88739篇 |
1988年 | 81892篇 |
1987年 | 80298篇 |
1986年 | 75806篇 |
1985年 | 72692篇 |
1984年 | 54359篇 |
1983年 | 46449篇 |
1982年 | 27856篇 |
1979年 | 50112篇 |
1978年 | 35814篇 |
1977年 | 29659篇 |
1976年 | 28654篇 |
1975年 | 30340篇 |
1974年 | 36622篇 |
1973年 | 35300篇 |
1972年 | 32960篇 |
1971年 | 31079篇 |
1970年 | 28785篇 |
1969年 | 26987篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
A 43-year-old alcoholic presented in coma with ketoacidosis, after three days of nausea and feeling generally unwell, which had been preceded by a prolonged three-week period of heavy alcohol consumption with poor dietary intake. The acidosis responded rapidly to intravenous dextrose. This is the first Scottish report of a case of alcoholic ketoacidosis. 相似文献
992.
F. Lesoin M. Rousseaux N. Bouasakao L. Villette C. E. Thomas A. Cama M. Jomin 《Acta neurochirurgica》1986,81(3-4):118-124
Summary The authors report 165 cases of thoraco-lumbar lesions with neurological dysfunction. All the patient were operated. They analyze the neurological and mechanical results and indicate the use of different osteosynthesis apparatus according to the type and level of lesions.Harrington's rods seem to give more precise repositioning while Roy Camille's plates give more stability. When the posterior wall of the spinal canal is intact, Kempf's compression rods can be used.Thoraxic spine injuries seem to be an indication for Harrington's rods, while lumbar injuries seem to call for Camille's plates. 相似文献
993.
Intrathecal morphine for post-thoracotomy pain 总被引:1,自引:0,他引:1
We wished to investigate possible differences in the duration of postoperative analgesia and the incidence of respiratory depression after the intrathecal injection in the lumbar area of 10 micrograms/kg morphine in hypobaric and hyperbaric solution for relief of post-thoracotomy pain. Twenty-nine patients received morphine plus dextrose (hyperbaric) and 21 received morphine in preservative-free normal saline. The duration of analgesia was longer with the morphine in the normal saline group than in the hyperbaric group (P less than 0.04). One patient developed delayed respiratory depression. Our data support the use of morphine in normal saline mixtures for greater duration of analgesia after thoracic operations. 相似文献
994.
An experimental model has been developed for the study of combined effects of partial body irradiation (PBI) and graft-versus-host disease (GVHD) in which irradiation is delivered to the thorax 24 hr prior to induction of GVHD in hybrid mice by the injection of parental lymphoid cells. In mice irradiated to 1000 cGy or exposed to low doses of allogeneic lymphoid cells (20 X 10(6)), survival was 100% at 250 days. In contrast, combination of the two treatments, GVHD and PBI, resulted in a mortality of 83% and a mean survival time of 29 days, indicating synergy between GVHD and PBI. From histological studies of the lung it appeared that about 40% of the deaths occurring after combined GVHD/PBR treatment might be attributable to pneumonia. The cause of death in the remaining mice receiving combined treatment is not known. Mice receiving combined PBI/lymphoid cell treatment develop a characteristic skin lesion that is not seen in nonirradiated mice and is confined to the irradiated area. The effect of preinduction PBR on the timing and severity of GVHD is similar to that which would be produced by an increase in the number of effector cells. 相似文献
995.
Do-not-resuscitate orders for critically ill patients in the hospital. How are they used and what is their impact? 总被引:9,自引:0,他引:9
We studied compliance with do-not-resuscitate (DNR) orders at a university hospital where a DNR protocol has existed since 1979. Documentation of DNR status in patient progress notes and chart orders increased through 1983. During a 12-month period (March 1983 through April 1984), we studied in detail the medical records of 521 patients who had a cardiopulmonary arrest in the hospital. Seventy-five percent (389 of 521) of these patients were designated DNR. Patients who were designated DNR were significantly more likely to be older, to have malignancy or an abnormal mental status, and to be less likely to have acute myocardial infarction, stroke, or chronic obstructive pulmonary disease than patients in whom resuscitation was attempted. Eighty-six percent of families, but only 22% of patients, were involved in the decision to designate a patient DNR. The decision to designate a patient DNR occurred late in the course of a patient's illness, often when the patient was in coma. For 28% of patients, some form of medical care was withdrawn or withheld after they were designated DNR. These data suggest that use of the DNR protocol requires changes if patients are to participate in the decision not to undergo cardiopulmonary resuscitation. 相似文献
996.
Transilial crest bone biopsy with quantitative histomorphometry is an important technique for the assessment of metabolic and endocrine bone disease. The surface area of the histologic section suitable for histomorphometric analysis is reduced by the build-up of bone dust and by trabecular fracture, produced by the conventional Bordier bone drill. We describe here a modification of this drill that both allows escape of dust from around the cutting edge of the teeth and greatly reduces bone dust volume and trabecular fracture. In paired samples the new drill was shown to improve significantly the quality of the biopsy specimens. 相似文献
997.
998.
999.
1000.