一.作文 给了一篇新闻,说是西城用的是volunteer ambulance service,东城用的是commercial ambulance service. Well, the average response time consumed by the West is longer than the time in the East reported by the commercial service.(貌似是这个,原句记不大清了) 所以,为了提高服务质量和增加医疗收入等,建议西城也启用commercial service.