When I got home, I found there were five bottles of boiled water placed on my study room desk, the bottles once thrown about after I drank up the purified water inside. My mother is keen on calculating things. She buys plenty of bottled water at half price, but only allows me to have them after the water jug is empty. To forbid the way I steal the bought-with-money, she provides the service of refilling the empty bottles with boiled water so that I would not turn to the unopened ones. My mother is skilled in strict budget, so that every penny is saved into big fortune. When I have the wrong impulse of buying something, I always take advice from my mother.