Contents and Features of This Book • Chapter 1: Introduction to Self-Care Design Fundamentals of health span, health literacy, and self-care are organized. Understand the WHO's definition of health and the concept of "extending healthy life expectancy." • Chapter 2: Health Care by Behavior Learn practical points for improving lifestyle habits such as diet, exercise, sleep, oral care, alcohol consumption, and smoking. • Chapter 3: Health Care According to Life Course Examine health management needs for each life stage, including children, women, the elderly, and pregnant women. • Chapter 4: Health Care by Theme Covers mental health, infectious disease prevention, cancer, diabetes, pre-disease, integrated medicine, and SDGs perspectives. • Detailed answers and explanations for all questions The structure clearly explains "why that answer is correct," deepening understanding. ⸻ ✅ A complete collection of 100 questions + detailed answers and explanations covering the entire scope ✅ Organize knowledge of health, nutrition, mental health, exercise, and preventive medicine in one book