知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。 The Great American writer Gene Wolfe commonly writes of such variances amongst young children and adults, and of that “ft in both equally camps” world which adolescents for a time inhabit. Probably his clearest assertion On this area is the following quotation: WHO guideline on the prevention https://hc6.org/