每年的1月的最后一个星期天是“世界防治麻风病日”，麻风病是由麻风杆菌引起的一种慢性接触性传染病。下列生物与麻风杆菌结构相似的是(　　)

为了解某小区家庭使用垃圾袋的情况，小亮随机调查了该小区10户家庭一周垃圾袋的使用量，结果如下：7，9，11，8，7，14，10，8，9，7（单位：个），关于这组数据下列结论正确的是（　　）

    A rich man loved his little boy very much. He wanted 1  him happy all the time. So he gave him everything that he could buy with   2 . But the little boy was still  3  .Where he went, he always wore a frown(皱眉). And he always wished for something he did not have. The rich man didn't know   4  to make his son happy.
    One day, a magician(魔术师) came and said to him, “I can make your son happy and  5  his frowns into smiles, but you must pay me a great price   6 telling him the secret.”
   “All right,” said the man, “No matter what you ask for, I  7  you.”The magician took the boy into a secret room. He wrote something on a piece of paper, and then gave it to the boy. There were some words on the paper, “Do one  8  thing for someone every day.” The boy followed the  9   and became one of the happiest boys.
    I think only those who are always thinking about   10  can be truly happy.