全文获取类型
收费全文 | 2348731篇 |
免费 | 181064篇 |
国内免费 | 7741篇 |
专业分类
耳鼻咽喉 | 31879篇 |
儿科学 | 77389篇 |
妇产科学 | 66424篇 |
基础医学 | 331731篇 |
口腔科学 | 65880篇 |
临床医学 | 207033篇 |
内科学 | 468571篇 |
皮肤病学 | 53465篇 |
神经病学 | 188928篇 |
特种医学 | 94311篇 |
外国民族医学 | 617篇 |
外科学 | 364916篇 |
综合类 | 52503篇 |
现状与发展 | 3篇 |
一般理论 | 683篇 |
预防医学 | 182764篇 |
眼科学 | 52421篇 |
药学 | 171543篇 |
6篇 | |
中国医学 | 4258篇 |
肿瘤学 | 122211篇 |
出版年
2018年 | 22794篇 |
2016年 | 20729篇 |
2015年 | 23424篇 |
2014年 | 32636篇 |
2013年 | 49352篇 |
2012年 | 63374篇 |
2011年 | 67925篇 |
2010年 | 41613篇 |
2009年 | 40049篇 |
2008年 | 64492篇 |
2007年 | 69461篇 |
2006年 | 70881篇 |
2005年 | 69070篇 |
2004年 | 66275篇 |
2003年 | 64492篇 |
2002年 | 62280篇 |
2001年 | 108034篇 |
2000年 | 111228篇 |
1999年 | 93718篇 |
1998年 | 27843篇 |
1997年 | 24994篇 |
1996年 | 25842篇 |
1995年 | 25335篇 |
1994年 | 23895篇 |
1993年 | 22253篇 |
1992年 | 77398篇 |
1991年 | 75839篇 |
1990年 | 73857篇 |
1989年 | 70816篇 |
1988年 | 66023篇 |
1987年 | 64725篇 |
1986年 | 61568篇 |
1985年 | 59066篇 |
1984年 | 44716篇 |
1983年 | 38235篇 |
1982年 | 23570篇 |
1981年 | 21056篇 |
1980年 | 19749篇 |
1979年 | 41443篇 |
1978年 | 29674篇 |
1977年 | 25291篇 |
1976年 | 23550篇 |
1975年 | 25318篇 |
1974年 | 29824篇 |
1973年 | 28607篇 |
1972年 | 26814篇 |
1971年 | 24846篇 |
1970年 | 22903篇 |
1969年 | 21848篇 |
1968年 | 20526篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
R E Dales A Mehdizadeh S D Aaron K L Vandemheen J Clinch 《The European respiratory journal》2006,28(2):319-322
The aim of the present study was to explore differences in the clinical expression, clinical diagnoses and management of airway diseases in a primary-care setting. Patients aged >or=35 yrs who had ever smoked were enrolled when they presented for any reason to one of eight rural primary-care practices. Respiratory symptom questionnaires and spirometry were administered. In total, 1,034 patients had acceptable and reproducible spirometry, of whom 550 (53%) were males and 484 (47%) were females. Males smoked more than females (41.2 versus 29.2 pack-yrs) respectively, and were more likely to have a pre-bronchodilator forced expiratory volume in one second/forced vital capacity <0.70 at 22.4 versus 11.8%, respectively. However, more females than males reported breathlessness (51.0 versus 42.8%, respectively), a prior diagnosis compatible with airflow obstruction and taking respiratory medications (23.4 versus 14.9%, respectively). In conclusion, the current results suggest that females are more likely than males to report breathlessness and be prescribed respiratory medications independent of differences in the severity of airflow obstruction. 相似文献
93.
94.
95.
96.
97.
98.
99.
For many parents stopping life-sustaining medical treatment on their dying infant is psychologically impossible. Dostoevsky's insights into human behavior, particularly the fact that individuals do not want the anxiety and guilt associated with responsibility for making difficult decisions, might change the way physicians approach parents for permission to withdraw life-prolonging medical interventions on dying infants. 相似文献
100.
L Laforest E Van Ganse G Devouassoux S Chretin L Osman G Bauguil Y Pacheco G Chamba 《The European respiratory journal》2006,27(1):42-50
French asthma patients may be supervised by general practitioners (GPs) and/or specialists. Therefore, this study examined asthma management in patients exclusively supervised by specialists (SPE), GPs, (GP) and both (GP+SPE group), and compared the findings. Asthma patients were consecutively recruited in 348 pharmacies. Each patient completed a questionnaire providing data on personal characteristics, asthma management, perception of disease and asthma supervision. Asthma control was measured using the Asthma Control Test. Questionnaires were linked to computerised records of medications which had been dispensed before inclusion in the study. From the 1,256 patients (mean age = 36.1 yrs, 54.3% females), 11.4, 36.6, and 52.0% were placed in the SPE, GP, and GP+SPE groups, respectively. During the previous 4 weeks, most patients in the SPE group were properly controlled (52.2 versus 26.4 and 21.5% in GP and GP+SPE groups, respectively). The SPE group made more use of fixed combinations of long-acting beta agonist and inhaled corticosteroid, while receiving less short-acting beta agonists, antitussives and antibiotics. Striking differences in symptoms and asthma management were observed according to the type of asthma supervision. The current results strongly support the need to improve the management of asthma in primary care, and the coordination of care between general practitioners and specialists. 相似文献