About 33% babies will get dementia(痴呆) when they become old. When people get dementia, their brain don’t work again. People start to forget things. They get angry or sad easily. They don’t know what they want to do. This is a big problem. There is nothing to stop dementia. We must do our best to find something helpful.
A doctor said: "More people will get dementia in the future if we don’t do anything now." He said it was a big challenge(挑战) and we must find ways to stop it. Many people all over the world have dementia. About 10% of us will get it. This number will go up(上升) as we live longer(更长).
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