题目内容：
(翻译)A smile costs nothing, but creates much. It enriches those who receive, without impoverishing those who give. It happens in a flash and the memory of it sometimes lasts forever. None are so rich that they can get along without it, and none so poor but are richer for its benefits. It creates happiness in the home, fosters goodwill in a business, and is the countersign of friends. It is rest to the weary, daylight to the discouraged and sunshine to the sad. Yet it cannot be bought, begged, borrowed, or stolen, for it is something that is no earthly good to anybody till it is given away. And if in the last-minute rush of Christmas buying some of our salespeople should be too tired to give you a smile, may we ask you to leave one of yours? For nobody needs a smile so much as those who have none left to give!(本题10.0分)
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