求翻译：健康对我们很重要。每个人都一样。那就让我叫你怎样保持健康。第一，我们要保持卫生，要多开窗户勤通风。是什么意思？

Health is very important to us. Everyone is the same. Let me tell you how to stay healthy. First, we need to maintain health, how to open the window ventilation.