全文获取类型
收费全文 | 22775篇 |
免费 | 5949篇 |
国内免费 | 51篇 |
专业分类
耳鼻咽喉 | 627篇 |
儿科学 | 833篇 |
妇产科学 | 776篇 |
基础医学 | 803篇 |
口腔科学 | 1208篇 |
临床医学 | 4035篇 |
内科学 | 7471篇 |
皮肤病学 | 463篇 |
神经病学 | 1103篇 |
特种医学 | 397篇 |
外科学 | 2871篇 |
综合类 | 128篇 |
现状与发展 | 2篇 |
一般理论 | 3篇 |
预防医学 | 3754篇 |
眼科学 | 505篇 |
药学 | 805篇 |
中国医学 | 28篇 |
肿瘤学 | 2963篇 |
出版年
2024年 | 165篇 |
2023年 | 1116篇 |
2022年 | 534篇 |
2021年 | 966篇 |
2020年 | 1358篇 |
2019年 | 637篇 |
2018年 | 1363篇 |
2017年 | 1365篇 |
2016年 | 1633篇 |
2015年 | 1597篇 |
2014年 | 2261篇 |
2013年 | 2451篇 |
2012年 | 1104篇 |
2011年 | 991篇 |
2010年 | 1356篇 |
2009年 | 1716篇 |
2008年 | 920篇 |
2007年 | 758篇 |
2006年 | 1046篇 |
2005年 | 601篇 |
2004年 | 515篇 |
2003年 | 419篇 |
2002年 | 350篇 |
2001年 | 355篇 |
2000年 | 286篇 |
1999年 | 291篇 |
1998年 | 371篇 |
1997年 | 273篇 |
1996年 | 272篇 |
1995年 | 208篇 |
1994年 | 171篇 |
1993年 | 134篇 |
1992年 | 134篇 |
1991年 | 116篇 |
1990年 | 126篇 |
1989年 | 106篇 |
1988年 | 99篇 |
1987年 | 79篇 |
1986年 | 79篇 |
1985年 | 59篇 |
1984年 | 60篇 |
1983年 | 49篇 |
1982年 | 23篇 |
1981年 | 17篇 |
1980年 | 28篇 |
1977年 | 27篇 |
1975年 | 28篇 |
1973年 | 20篇 |
1972年 | 23篇 |
1970年 | 20篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
53.
Bulimia is a distinct diagnostic eating disorder with its most noted manifestation being the rapid ingestion of large quantities of food followed by its elimination through the mouth. Because of the dental implications of highly acidic stomach contents chronically being regurgitated, the dentist is in a unique position to help identify the patient with bulimia. Dental erosion is not only the most easily noted but also the most destructive of the many oral problems caused by bulimia. This report of case describes a preventive dental prosthesis that can be used by the patient with bulimia to protect those teeth that are most affected by dental erosion. The construction of the prosthesis is easily completed with materials in the dental office and provides a great service to the patient with bulimia. 相似文献
54.
55.
56.
Chu‐Lin Tsai MD MPH Justin A. Sobrino BS Carlos A. Camargo Jr MD DrPH 《Academic emergency medicine》2008,15(12):1275-1283
Objectives: Little is known about recent trends in U.S. emergency department (ED) visits for acute exacerbation of chronic obstructive pulmonary disease (AECOPD) or about ED management of AECOPD. This study aimed to describe the epidemiology of ED visits for AECOPD and to evaluate concordance with guideline‐recommended care. Methods: Data were obtained from National Hospital Ambulatory Medical Care Survey (NHAMCS). ED visits for AECOPD, during 1993 to 2005, were identified using the International Classification of Diseases, Ninth Revision, Clinical Modification (ICD‐9‐CM) codes. Concordance with guideline recommendations was evaluated using process measures. Results: Over the 13‐year study period, there was an average annual 0.6 million ED visits for AECOPD, and the visit rates for AECOPD were consistently high (3.2 per 1,000 U.S. population; Ptrend = 0.13). The trends in the use of chest radiograph, pulse oximetry, or bronchodilator remained stable (all Ptrend > 0.5). By contrast, the use of systemic corticosteroids increased from 29% in 1993–1994 to 60% in 2005, antibiotics increased from 14% to 42%, and methylxanthines decreased from 15% to <1% (all Ptrend < 0.001). Multivariable analysis showed patients in the South (vs. the Northeast) were less likely to receive systemic corticosteroids (odds ratio [OR] = 0.6; 95% confidence interval [CI] = 0.4 to 0.9). Conclusions: The high burden of ED visits for AECOPD persisted. Overall concordance with guideline‐recommended care for AECOPD was moderate, and some emergency treatments had improved over time. 相似文献
57.
As the proportion of racial, ethnic, and cultural minorities in the United States continues to expand, pediatric emergency medicine providers are increasingly likely to encounter cultural and language barriers in practice. This paper reviews a conceptual framework encompassing the decision to seek emergency care, the process of providing such care, and the adherence to treatment plans and follow-up. The ways in which cultural and language barriers can negatively impact each element of this model are discussed in detail. Specific examples include provider ignorance of dangerous folk beliefs, communication barriers secondary to inappropriate interpreter use, and discriminatory assumptions regarding child abuse, pain management, and sexual activity. The practitioner is then provided with concrete recommendations to reduce these negative effects. 相似文献
58.
59.
60.
GILBERTE A. VANSINTEJAN RN MPH EDD PETER J. PURDY MPH 《Journal of obstetric, gynecologic, and neonatal nursing : JOGNN / NAACOG》1986,15(6):492-495
Since the mid-1970s, the Margaret Sanger Center of Planned Parenthood of New York City has prepared nurses and nurse midwives from less developed countries to be family-planning nurse practitioners. These nurse practitioners then provide services to patients, train other staff, and manage integrated family-planning clinics. More than 120 nurses and nurse midwives have arrived in groups of 10 at the Sanger Center, with 72 attending since 1981. Each course lasts 10 weeks. The core curriculum provides trainees with skills in women's health care including contraception, in training and advocacy, and in management of clinics. Whether, in the current period of scarce resources, cross-cultural training programs of this type remain a worthwhile investment, and if so, which of their components are most important to this success, is assessed. 相似文献