Once upon a time,a man kept a flock of sheep.One morning,he was going out to herd them but he found that one was lost.After examined the sheepfold carefully,he saw a hole.Apparently,a wolf got into the sheepfold and took the sheep away.A neighbor advised him to repair the sheefold but he did not take the advice.The next day he found another sheep was lost.He remembered his neighbor's words,so he quickly repaired the sheepfold.After that,his sheep have not been stolen by wolves anymore. The story vividly tells us that if something goes wrong,fix the issue as quickly as possible can prevent greater losses.