全文获取类型
收费全文 | 6369篇 |
免费 | 516篇 |
国内免费 | 24篇 |
专业分类
耳鼻咽喉 | 37篇 |
儿科学 | 249篇 |
妇产科学 | 176篇 |
基础医学 | 978篇 |
口腔科学 | 59篇 |
临床医学 | 656篇 |
内科学 | 1319篇 |
皮肤病学 | 108篇 |
神经病学 | 706篇 |
特种医学 | 159篇 |
外科学 | 601篇 |
综合类 | 26篇 |
一般理论 | 4篇 |
预防医学 | 691篇 |
眼科学 | 136篇 |
药学 | 496篇 |
中国医学 | 22篇 |
肿瘤学 | 486篇 |
出版年
2023年 | 48篇 |
2022年 | 72篇 |
2021年 | 166篇 |
2020年 | 102篇 |
2019年 | 188篇 |
2018年 | 197篇 |
2017年 | 150篇 |
2016年 | 163篇 |
2015年 | 175篇 |
2014年 | 258篇 |
2013年 | 290篇 |
2012年 | 486篇 |
2011年 | 487篇 |
2010年 | 286篇 |
2009年 | 243篇 |
2008年 | 398篇 |
2007年 | 402篇 |
2006年 | 391篇 |
2005年 | 354篇 |
2004年 | 377篇 |
2003年 | 323篇 |
2002年 | 279篇 |
2001年 | 106篇 |
2000年 | 76篇 |
1999年 | 84篇 |
1998年 | 92篇 |
1997年 | 59篇 |
1996年 | 37篇 |
1995年 | 34篇 |
1994年 | 40篇 |
1993年 | 42篇 |
1992年 | 40篇 |
1991年 | 26篇 |
1990年 | 27篇 |
1989年 | 38篇 |
1988年 | 27篇 |
1987年 | 24篇 |
1986年 | 28篇 |
1985年 | 22篇 |
1984年 | 19篇 |
1983年 | 19篇 |
1982年 | 15篇 |
1980年 | 12篇 |
1979年 | 22篇 |
1977年 | 13篇 |
1975年 | 12篇 |
1974年 | 11篇 |
1971年 | 13篇 |
1968年 | 13篇 |
1965年 | 11篇 |
排序方式: 共有6909条查询结果,搜索用时 31 毫秒
1.
2.
3.
Jeroen M. van de Pol Jurjen G. Geljon Svetlana V. Belitser Geert W.J. Frederix Anke M. Hövels Marcel L. Bouvy 《Research in social & administrative pharmacy》2019,15(1):70-76
Introduction
The nature of community pharmacy is changing, shifting from the preparation and distribution of medicines to the provision of cognitive pharmaceutical services (CPS); however, often the provision of traditional services leaves little time for innovative services. This study investigated the time community pharmacists spend on the tasks and activities of daily practice and to what extent they are able to implement CPS-related services in daily practice.Methods
Self-reporting work sampling was used to register the activities of community pharmacists. A smartphone application, designed specifically for this purpose, alerted participants to register their current activity five times per working day for 6 weeks. Participants also completed an online survey about baseline characteristics.Results
Ninety-one Dutch community pharmacists provided work-sampling data (7848 registered activities). Overall, 51.5% of their time was spent on professional activities, 35.4% on semi-professional activities, and 13.1% on non-professional activities. The proportion of time devoted to CPS decreased during the workweek, whereas the time spent on traditional task increased.Discussion and conclusion
This study shows it is feasible to collect work-sampling data using smartphone technology. Community pharmacists spent almost half of their time on semi-professional and non-professional activities, activities that could be delegated to other staff members. In practice, the transition to CPS is hampered by competing traditional tasks, which prevents community pharmacists from profiling themselves as pharmaceutical experts in daily practice. 相似文献4.
5.
6.
Leonard A. Jason PhD Steven B. Pokorny PhD Monica Adams MPH Annie Topliff MA Courtney Harris BA Yvonne Hunt PhD 《The American journal on addictions / American Academy of Psychiatrists in Alcoholism and Addictions》2009,18(5):367-374
This study evaluated the effects of tobacco Purchase, Use and Possession (PUP) laws on student perceptions of adolescent tobacco use within towns and schools. Twenty‐four towns were randomly assigned into two conditions, the experimental condition (E PUP) involved efforts to increase both PUP law enforcement and reduce minors' access to commercial sources of tobacco, whereas the control condition (C) focused only on efforts to reduce minors' access to commercial sources of tobacco. A hierarchical linear modeling analytical approach was selected due to the multilevel data and nested design. The present study found that over time, youth in the experimental PUP condition observed less youth tobacco usage at school and in their town, and perceived lower rates of tobacco among their peers at school and among friends than youth in the control condition. The findings suggest that PUP law enforcement might be used to strengthen community norms against youth tobacco use. 相似文献
7.
8.
9.
Annie Mathieu Stéphanie Mazza Dominique Petit Anne Décary Jessica Massicotte-Marquez Jacques Malo Jacques Montplaisir 《Clinical neurophysiology》2007,118(7):1538-1544
OBJECTIVE: The aim of this study was to determine whether EEG slowing is more pronounced in older than younger OSAS patients and to verify whether this cortical slowing is correlated to daytime performance, respiratory perturbation and sleep fragmentation. METHODS: Twelve young OSAS patients (mean age 38.2+/-2.0 y) and 13 older OSAS patients (mean age 62.2+/-1.9 y) along with 13 young controls (mean age 35.8+/-2.0 y) and 14 older controls (mean age 60.2+/-2.0 y) underwent a polysomnographic evaluation followed by a waking EEG recording. As a global index of cortical slowing, a ratio of slow-to-fast frequencies was calculated in all cortical regions. Daytime performance was assessed using the four choice reaction time test. RESULTS: Differences in waking EEG and in daytime performance were analyzed by ANOVAs with Group and Age as factors. Waking EEG did not yield a Group by Age interaction. OSAS patients had higher ratios across all regions than controls. Similarly, daytime performance revealed no Group by Age interaction. However, OSAS patients showed more lapses than controls and older subjects were slower than younger subjects. CONCLUSIONS: Our results indicate that age does not interact with OSAS to worsen the severity of cortical slowing, but age can add to the OSAS effect to worsen daytime performance deficits in OSAS patients. SIGNIFICANCE: The daytime performance deficits observed particularly in elderly OSAS patients warrant a careful clinical assessment of these patients to prevent accidents and injuries. 相似文献
10.
Daniela Klitscher Lars P. Müller Pol Rommens 《European journal of trauma and emergency surgery》2007,33(1):69-73
Abstract 10 embalmed cadaver forearms and wrists were dissected to determine the anatomical course of the superficial branch of the
radial nerve in the distal forearm. The superficial radial nerve bifurcated in two branches at a mean of 54,7 mm proximal
to the radial styloid. From the styloid process of the radius, the mean distance to the closest dorsal branch of the superficial
radial nerve was 3,5 mm and the mean distance to the closest volar branch was 9,8 mm. The mean distance between the closest
branch of the superficial radial nerve and Lister?s tubercle was 16,4 mm. The crossing point between the nerve and the cephalic
vein was located at a mean of 54,3 mm proximal to the styloid process. At the level of styloid process the mean distance between
the closest dorsal branch of the superficial radial nerve and the first dorsal compartment was 15,2 mm and between the closest
volar branch and the first dorsal compartment 4,4 mm. Detailed knowledge of anatomic characteristics of the superficial branch
of the radial nerve may help prevent injury during operations and treat traumatic lesions of the nerve. Because of great variations
in the course of the superficial radial nerve we could not define an absolute safe zone for surgical procedures on the distal
forearm. Iatrogenic lesions of the superficial radial nerve are described complications of percutaneous procedures. Therefore
open surgical approaches are recommended.
Daniela Klitscher and Lars Peter Müller contributed equally to this work. 相似文献