买房慎选这“4个楼层”！硬伤多影响生活，尤其是第一个

Group 1 - The article discusses the importance of carefully considering the floor level when purchasing a property, emphasizing that comfort and safety should be prioritized over superstitions associated with certain floors [1] Group 2 - The first floor is often preferred for its convenience, but it has significant drawbacks such as poor lighting, ventilation issues, humidity, privacy concerns, and safety risks from potential theft and falling objects [3] - The "return water layer," typically found on the second or third floor, is prone to sewage backflow if the main drainage system is blocked, leading to unpleasant and costly cleanup [5] - Equipment floors, which house machinery for elevators and utilities, can cause noise and vibrations that disrupt living conditions, especially at night, and may require frequent maintenance access [7] - Living above commercial shops can lead to persistent noise from business operations and unpleasant odors from food establishments, making it difficult to enjoy a peaceful home environment [9]