全文获取类型
收费全文 | 1303篇 |
免费 | 118篇 |
国内免费 | 20篇 |
专业分类
耳鼻咽喉 | 20篇 |
儿科学 | 39篇 |
妇产科学 | 14篇 |
基础医学 | 136篇 |
口腔科学 | 31篇 |
临床医学 | 134篇 |
内科学 | 267篇 |
皮肤病学 | 13篇 |
神经病学 | 122篇 |
特种医学 | 134篇 |
外国民族医学 | 3篇 |
外科学 | 180篇 |
综合类 | 31篇 |
预防医学 | 134篇 |
眼科学 | 31篇 |
药学 | 95篇 |
中国医学 | 1篇 |
肿瘤学 | 56篇 |
出版年
2022年 | 10篇 |
2021年 | 36篇 |
2020年 | 12篇 |
2019年 | 23篇 |
2018年 | 37篇 |
2017年 | 30篇 |
2016年 | 22篇 |
2015年 | 28篇 |
2014年 | 34篇 |
2013年 | 41篇 |
2012年 | 45篇 |
2011年 | 73篇 |
2010年 | 39篇 |
2009年 | 37篇 |
2008年 | 43篇 |
2007年 | 64篇 |
2006年 | 47篇 |
2005年 | 45篇 |
2004年 | 34篇 |
2003年 | 38篇 |
2002年 | 32篇 |
2001年 | 23篇 |
2000年 | 25篇 |
1999年 | 27篇 |
1998年 | 36篇 |
1997年 | 27篇 |
1996年 | 17篇 |
1995年 | 28篇 |
1994年 | 22篇 |
1993年 | 20篇 |
1992年 | 20篇 |
1991年 | 14篇 |
1990年 | 24篇 |
1989年 | 37篇 |
1988年 | 28篇 |
1987年 | 29篇 |
1986年 | 26篇 |
1985年 | 26篇 |
1984年 | 15篇 |
1982年 | 12篇 |
1980年 | 10篇 |
1978年 | 10篇 |
1977年 | 12篇 |
1976年 | 15篇 |
1975年 | 12篇 |
1973年 | 16篇 |
1971年 | 18篇 |
1969年 | 9篇 |
1968年 | 9篇 |
1967年 | 11篇 |
排序方式: 共有1441条查询结果,搜索用时 15 毫秒
1.
Chronic obstructive pulmonary disease is one of the most significant chronic illnesses of adults. Comprehensive care of the affected patient requires the medical-surgical nurse to have knowledge of the disease process, collaborative management, and nursing care based on research and current practice guidelines. 相似文献
2.
3.
4.
C V Patrick Onyeaka Christos Alexiou Gaetano Rocco David N Hopkinson S Kim Suvarna Peter C Braidley Tim J Locke 《The Journal of heart and lung transplantation》2005,24(8):1140-1142
Transplant pneumonectomy is a rarely performed procedure. It is occasionally carried out in the course of retransplantation. To our knowledge, resection of a transplanted lung without its replacement and with successful outcome in the adult has not been previously reported. We present a case of elective left transplant pneumonectomy in a 38-year-old man 6 years after left single-lung transplant. At 12 months after resection, the patient remains well, with good exercise tolerance. 相似文献
5.
6.
7.
Perfluorochemicals as US contrast agents for tumor imaging and hepatosplenography: preliminary clinical results 总被引:3,自引:0,他引:3
Mattrey RF; Strich G; Shelton RE; Gosink BB; Leopold GR; Lee T; Forsythe J 《Radiology》1987,163(2):339-343
In animals, perfluorochemicals (PFCs) are effective ultrasound (US) contrast agents that produce hepatic, splenic, and tumor enhancement. The use of Fluosol-DA 20%, an emulsion of perfluorodecalin and perfluorotripropylamine, was studied in nine non-critically ill patients with cancer who had liver lesions. US studies without Fluosol were compared with studies obtained 24, 48, and 72 hours after Fluosol infusion. Vital signs and extensive laboratory analyses are performed before and after Fluosol infusion. Liver metastases from colonic, pancreatic, and gastric carcinoma exhibited rim or diffuse enhancement after a Fluosol dose of 1.6 g/kg or greater. Fluosol produced echogenic enhancement of the liver and spleen relative to kidney at a dose of 2.4 g/kg, allowing the detection of nonenhancing lesions. In addition, Fluosol at a dose of 1.6 g/kg or greater allowed detection of lesions not seen before contrast medium was administered in three of the seven patients studied. There was a mild increase in the level of serum glutamic oxaloacetic transaminase in two patients, one given 2.4 and the other 3.2 g/kg of Fluosol. Mild and transient allergic reactions without change in vital signs were experienced by two patients. 相似文献
8.
Seven elite boardsailors reporting nonradiating low back pain without leg pain during sailing volunteered for detailed examination. In these subjects, the onset of pain was limited to those occasions when sailing positions were held for a significant period of time, e.g., close hauled sailing or in light winds. No pain was described at any other time. The determination of possible antecedent factors was based on the results of clinical assessment, radiological evaluation, and computer tomography (CT) scanning. Apart from limited flexibility in some subjects, the clinical examination of these athletes was normal; CT changes in this group were limited to disc protrusions and bulges, and pars interarticularis defects. Despite the small number of subjects in the present report, it appears that the frequency of these problems exceeds that in the normal population. It may be possible to suggest that risk factors such as body position during prolonged sailing, particularly under light wind conditions without a harness, and limited flexibility may be associated with the radiological findings and may be implicated in the presence of low back pain, although further investigations appears warranted. 相似文献
9.
Epidemiologic evidence for early onset of mental disorders and higher risk of drug abuse in young adults 总被引:8,自引:0,他引:8
K A Christie J D Burke D A Regier D S Rae J H Boyd B Z Locke 《The American journal of psychiatry》1988,145(8):971-975
Data from the National Institute of Mental Health (NIMH) Epidemiologic Catchment Area Program, an epidemiologic survey of five communities, showed that four major disorders commonly begin in late adolescence or young adulthood. The median age at onset for anxiety disorders is 15 years; for major depressive episode, 24 years; for drug abuse or dependence, 19 years; and for alcohol abuse or dependence, 21 years. Findings also suggest that for respondents 18-30 years old, having a major depressive episode or anxiety disorder doubles the risk for later drug abuse or dependence. 相似文献
10.