A few points for using of the textbook /Ch1 as an example 1. Carefully read each Part Introduction to find the connections between different chapters of each Part, and how the contents are organized. 2. Find the organization of each chapter by reading the Chapter Introduction. 3. Read the figures to understand the concept in each subtitle. Main principles: from large view to details, from easy to difficult.A few points for using of the textbook 【Ch1 as an example】 1. Carefully read each Part Introduction to find the connections between different chapters of each Part, and how the contents are organized. 2. Find the organization of each chapter by reading the Chapter Introduction. 3. Read the figures to understand the concept in each subtitle. Main principles: from large view to details, from easy to difficult