如图是一座人行天桥的示意图，天桥的高度是10米，CB⊥DB，坡面AC的倾斜角为45°．为了方便行人推车过天桥，市政部门决定降低坡度，使新坡面DC的坡度为i= ：3．若新坡角下需留3米宽的人行道，问离原坡角（A点处）10米的建筑物是否需要拆除？（参考数据： ≈1.414， ≈1.732）

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阅读理解

    Every country has its favourite food. In some countries, people(人们) eat rice every day. They often eat it with meat, fish and vegetables.       

   Japanese(日本人) eat a lot of fish, and they eat a lot of rice, too. In England(英国), the favourite food is fried fish and French fries. In the USA(美国) people like hamburgers a lot. And they like to have cold drinks. In Canada, people eat bread with butter(黄油) on it. In India, people like to eat hot food. Some people eat only fruit and vegetables. They don't like to eat meat and fish. They think green food is good for them.