对象要素法：每一个雅思写作题目都包括很多的要素，在我们准备这些雅思写作的时候，就可以从这些要素入手，逐一分析，这样就会让整个雅思写作更加的全面。
考题：air transport is increasingly used to export fruits and vegetables to some coutries where can not be grown or out of season. Some people think it is not justified. What is your opinion?
我们可从话题所涉及的各个对象出发，如空运水果蔬菜是否合理，那么空运水果蔬菜所涉及的对象就多了，包括出口国，进口国，消费者，航空公司和政府。
对各个要素的分析：
1. for consumers, they can taste some foreign foods without going to other countries.
2. for transporters, such operation can bring much income. Actually, only about 40% seats of plane are in service in off-seasons compared to offering discounted plane tickets, transporting foods may be a better choice.
3. for exporters, such orders are gold of their business. With the development of technology, the yield is increasing, but if those foods can not be sold immediately, they may decay/rot/ go bad/ moldy. The air transportation just solves this problem and brings money for them.