Have you ever heard of it? Does shopping with cash(现金)really help you lose weight? Some scientists have studied for years. The US scientists have(发现) that customers who take debit cards(借记卡)to the shops and(忘)their cash at home are more likely to take junk food from the(架子). That is to say, they are easy to get fat.

    There are two reasons leading to this (结果). First, people only think some kinds of food is delicious, but they don't consider whether it's healthy or not. (第二), cash payments are more painful than card payments for the customers, so this painful payment can stop them from buying(无论什么)they want.

    American scientists even think that one of the(恰当的)reasons why westerners are generally getting fat is that they are paying(用)debit cards most of time. In this case, it is easy for people to (变得)fat. You can find that cash is commonly used by the thin men, and debit cards are used by the fat men.

    Maybe those fat men would say (自豪地)that they are rich and they can buy anything they need.