Application**

This book is really useful! It is centered on "knowledge-led and ability-driven" and helps us master problem-solving methods through actual cases. The ideological and political elements of the course in the book are also great, allowing us to establish the correct three views while learning mathematics. I especially like a sentence in the book: "Mathematics is the key to opening the door to science." This sentence made me deeply realize the importance of mathematics. All in all, this is a highly recommended book!