it can't be more important than what is stated in the book that is the preciousness of time and the method to use it efficently（请问that在句子中的用法）能否分析一下这个句子结构？

it can't be more important than what is stated in the book that is the preciousness of time and the method to use it efficently（请问that在句子中的用法）
能否分析一下这个句子结构？