From the view of my point,this passage is quite useful because it is closely linked to our daily life.Since then,wo can gain a lot of message from it.For those who often go out for meal,it's very important to pay more attention to select those popular food's city.As we all kown,the food from the street hawker may not be enough tidy and more easily to result in toxication.If no special days,we'd better to cook at home.It's no doubt that the food cooked at home are more safe than that from outdoor.we often find many persons are poisoned by eating problematic food so we should form a nice individual habit. 能力有限,颇费心机,希望对你有帮助,仅供参考。