对垃圾内容的分析,了解人们消费各种食物的情况,得知减肥清凉饮料与压榨的橘子汁属高层收入人士的倾向消费品。教授还指出:垃圾袋绝不会说谎和弄虚作假,什么样的人丢什么样的垃圾,查看人们所丢弃的垃圾,是一种很好的行销研究方法。在常规的调查中,我们会设计各种各样的调查问卷 An analysis of the content of rubbish to understand how people consume a variety of foods and learn that slimming drinks and squeezed orange juice are consumer products of high-income earners. The professor also pointed out: Garbage bags will never lie and fraud, what kind of people lost what kind of garbage, people discarded garbage, is a good marketing research methods. In a regular survey, we design a variety of questionnaires