全文获取类型
收费全文 | 37486篇 |
免费 | 6852篇 |
国内免费 | 163篇 |
专业分类
耳鼻咽喉 | 771篇 |
儿科学 | 1338篇 |
妇产科学 | 1218篇 |
基础医学 | 2444篇 |
口腔科学 | 2930篇 |
临床医学 | 6058篇 |
内科学 | 7799篇 |
皮肤病学 | 731篇 |
神经病学 | 3603篇 |
特种医学 | 1281篇 |
外科学 | 5347篇 |
综合类 | 180篇 |
现状与发展 | 12篇 |
一般理论 | 10篇 |
预防医学 | 5016篇 |
眼科学 | 536篇 |
药学 | 1196篇 |
1篇 | |
中国医学 | 59篇 |
肿瘤学 | 3971篇 |
出版年
2024年 | 187篇 |
2023年 | 1273篇 |
2022年 | 694篇 |
2021年 | 1291篇 |
2020年 | 1609篇 |
2019年 | 1128篇 |
2018年 | 2073篇 |
2017年 | 1818篇 |
2016年 | 2003篇 |
2015年 | 2111篇 |
2014年 | 2692篇 |
2013年 | 3362篇 |
2012年 | 2194篇 |
2011年 | 2330篇 |
2010年 | 2158篇 |
2009年 | 2617篇 |
2008年 | 1778篇 |
2007年 | 1552篇 |
2006年 | 1591篇 |
2005年 | 1326篇 |
2004年 | 1097篇 |
2003年 | 947篇 |
2002年 | 855篇 |
2001年 | 472篇 |
2000年 | 325篇 |
1999年 | 448篇 |
1998年 | 568篇 |
1997年 | 549篇 |
1996年 | 584篇 |
1995年 | 416篇 |
1994年 | 337篇 |
1993年 | 291篇 |
1992年 | 188篇 |
1991年 | 168篇 |
1990年 | 148篇 |
1989年 | 156篇 |
1988年 | 138篇 |
1987年 | 132篇 |
1986年 | 107篇 |
1985年 | 101篇 |
1984年 | 81篇 |
1983年 | 94篇 |
1982年 | 90篇 |
1981年 | 72篇 |
1980年 | 49篇 |
1979年 | 34篇 |
1978年 | 36篇 |
1977年 | 43篇 |
1976年 | 32篇 |
1975年 | 29篇 |
排序方式: 共有10000条查询结果,搜索用时 20 毫秒
51.
52.
Melissa Kang Diana Bernard Michael Booth Susan Quine Garth Alperstein Tim Usherwood David Bennett 《The British journal of general practice》2003,53(497):947-952
BACKGROUND: To adequately address the complex health needs of young people, their access to services, and the quality of services received, must be improved. AIMS: To explore the barriers to service provision for young people and to identify the training needs of primary healthcare service providers in New South Wales (NSW), Australia. DESIGN OF STUDY: A cross-sectional, qualitative study of the perspectives of a range of health service providers. SETTING: A range of primary healthcare organisations across NSW. METHODS: Samples of general practitioners (GPs), youth health workers, youth health coordinators, and community health centre staff were drawn from urban and rural clusters across NSW. Focus groups and interviews were used to identify barriers to service provision and the training needs of service providers. Data were tape recorded, transcribed, and analysed. RESULTS: Barriers to service provision among GPs and community health centre staff included inadequate time, flexibility, skills, and confidence in working with young people, and poor linkages with other relevant services. Training needs included better knowledge of and skills in adolescent health requirements, working with adolescents, and working with other services. Barriers to service provision for youth health workers and coordinators included lack of financial resources and infrastructure. There were few linkages between groups of service providers. CONCLUSION: Models of service provision that allow stronger linkages between service providers, sufficient time for consultation with young people, adequate training and support of health professionals, and flexibility of service provision, including outreach, should be explored and evaluated. 相似文献
53.
Ronald R. Watson PhD Mary E. Mohs MS RD Cteamond Eskelson PhD Richard E. Samptiner MD Barbara Hartmann PhD 《Alcoholism, clinical and experimental research》1986,10(4):364-385
The prevalence and incidence of heavy alcohol consumption are major problems which have been increasing in many countries in recent years. It is crucial for physicians to consistently identify early drinking problems as well as the various end disease states in order to minimize suffering and maximize recovery. This paper reviews the evolutionary development of clinical tools for detection of alcohol abuse. The focus is primarily on clinical/biochemical indicators of alcohol abuse, emphasizing but not limited to changes in hematological characteristics, liver enzyme activity, lipids, immune function factors, hormones, neurological factors, and some physically based tests. Use of test combinations and sophisticated statistical analysis of pattern changes in test batteries evidence increased diagnostic efficiency. 相似文献
54.
55.
56.
Robert Reed MS Igor Grant MD Kenneth M Adams PhD 《Alcoholism, clinical and experimental research》1987,11(4):340-344
We examined the relationship of history of alcoholism in first-degree relatives to neuropsychological performance of alcoholics abstinent from several weeks to several years. Eighty-four men were assigned to four groups based on "strength" of family history of alcoholism. The groups were: (1) "strong history," a parent plus another first-degree relative positive; (2) "moderate," parent only positive; (3) "weak," nonparent first-degree relative only positive; and (4) "negative," no first-degree relative positive. There were no significant between-group differences in NP performance. In other analyses there were no NP differences between alcoholics classified positive or negative purely on basis of paternal alcoholism, and no differences between subjects who had multigenerational versus unigenerational versus negative familial histories of alcoholism. It is concluded that genetic loading for alcoholism does not significantly affect the NP status of abstinent alcoholic groups equated for education, drinking history, and medical risk. 相似文献
57.
58.
Droperidol (DROP) is used in the emergency department (ED) for sedation, analgesia, and its antiemetic effect. Its ED safety profile has not yet been reported in patients (pts). OBJECTIVES: To document the use of DROP in high-risk pts (those with head injury, alcohol or cocaine intoxication, and/or remote or recent seizures), and to determine the number of serious and minor adverse events (AEs)-seizures, hypotension, extrapyramidal side effects (EPSEs)-after DROP. METHODS: The ED database (EmSTAT) was queried to determine who received intramuscular or intravenous DROP in the ED in 1998; further chart review was done if the patient was considered high risk for or had experienced an AE. Multiple regression analysis using a random-effects model determined the significance of each variable in the occurrence of AEs. RESULTS: 2,468 patients (aged 20 months to 98 years; 112 < or =17 years; 141 > or =66 years) received DROP for agitation (n = 1,357), pain (1,135), anxiety (99), vomiting (173), or other reasons (50). There were 945 pts considered high risk; 933 charts were reviewed (DROP mean dose 4.1 +/- 2.0 mg); of these, 50 patient visits did not meet the criteria for high risk. There were 622 pts with head trauma (401 with alcohol use), including 47 with computed tomography (CT) scans positive for brain injury, 64 with cocaine use, and 197 with recent or remote seizures (137 with alcohol use). Minor AEs such as transient hypotension occurred in 96 pts after DROP (73 with alcohol use); 20 received intravenous fluids, while an additional 28 pts (8 with alcohol use) received rescue medications for EPSEs. Six possible serious AEs occurred in pts with serious comorbidities; 2 cases of respiratory depression, 3 post-DROP seizures, and 1 cardiac arrest (resuscitated) 11 hours after DROP in a cocaine-intoxicated pt (normal QT interval). There was no significant difference among high-risk groups in the occurrence of AEs. CONCLUSIONS: The vast majority of pts who received DROP in the ED did not experience an AE. A few serious AEs were noted following DROP in patients with serious comorbidities; it is not clear that DROP was causative. 相似文献
59.
Kelley Withy MD MS ; January May Andaya; Judith S. Mikami RN MPH ; Seiji Yamada MD MPH 《The Journal of rural health》2007,23(1):84-88
CONTEXT: Health disparities between rural and urban communities are well documented. There are many suggested causes and many proposed solutions but no one-size-fits-all answer. The most successful community interventions have been introduced by communities themselves. However, before communities invest in such interventions, each group must identify and prioritize their needs. PURPOSE: This article describes the Hoshin facilitation method as a practical option assisting communities in assessing their needs and gaining consensus for future steps. METHODS: Thirty-four meetings were held in 11 rural communities in Hawaii using the Hoshin process to identify factors that impact rural health. Themes were identified by constant comparative analysis and thematic frequency described. Commonality of responses between communities was examined. Informal feedback was collected from meeting participants. FINDINGS: There was a great deal of commonality between community responses, with economic factors, drug use, lack of community leadership, lack of health care services and access to services, lack of healthy activities for youth, and poor public education being the most common issues noted. Group involvement in the meetings was high, and the facilitation method received positive feedback from participants. CONCLUSIONS: The Hoshin facilitation method is a very useful tool to help communities rapidly identify and prioritize areas for programmatic attention. 相似文献
60.
Dennis M Mello MD Doff B McElhinney MS Andrew J Parry MD Norman H Silverman MD Frank L Hanley MD 《The Annals of thoracic surgery》1997,64(6):1808-1810
In hearts with a common arterial trunk (truncus arteriosus), there is almost always an inverse development of the aortic arch and the ductus arteriosus. Truncus with a normal aortic arch and a patent ductus is a rare echocardiographic and surgical finding. In this report, we describe 2 neonates in whom truncus arteriosus with a normal aortic arch and a medium or large patent ductus was diagnosed by preoperative echocardiography (without catheterization) and confirmed intraoperatively. 相似文献