Core Viewpoint - The article emphasizes the increased safety risks associated with the use of electricity, gas, and fire during the winter season in China, highlighting the importance of safety measures and awareness to prevent accidents and ensure safe usage of heating appliances and gas systems [1][2][3]. Group 1: Electrical Safety - The use of high-power electrical appliances like electric heaters and electric blankets increases during winter, raising fire risks, thus safety precautions must be prioritized [1]. - When purchasing heating devices, consumers should look for the "3C" mark, which indicates compliance with national safety standards, and ensure that products have essential safety features such as "overheat protection" and "automatic shut-off" [1]. - Past incidents have shown that placing flammable materials on electric heaters can lead to fires, underscoring the need for careful usage and distance from combustible items [1]. Group 2: Gas Safety - In winter, kitchens are often sealed, leading to insufficient oxygen supply, which can cause incomplete combustion of gas and result in carbon monoxide poisoning [2]. - The color of the flame from gas appliances can indicate safety; a blue flame signifies proper combustion, while yellow or red flames indicate incomplete burning, necessitating immediate ventilation [2]. - Many so-called energy-saving products may not be compatible with gas appliances, potentially causing damage or safety hazards, thus regular checks by gas companies are recommended [2]. Group 3: Fire Emergency Response - Winter is a peak season for fires, and in case of a fire, a systematic approach of "judge, report, extinguish, evacuate" should be followed [3]. - The first minute after a fire starts is critical for assessment; if the fire exceeds the size of an A4 paper or is not controlled within that time, evacuation and alerting authorities is essential [3]. - In case of a fire in a residential building, residents should rely on sensory cues like door temperature and smoke to determine safety, and if necessary, stay put and seal off the area while waiting for rescue [3].

Core Viewpoint - The article emphasizes the safety hazards associated with gas usage during winter and provides three key preventive measures to mitigate these risks [1][2]. Group 1: Common Safety Hazards - The use of direct exhaust water heaters poses a significant risk as they do not have a flue system, leading to the potential for carbon monoxide poisoning in enclosed spaces [1]. - Improper installation of gas water heater exhaust pipes can result in backflow of combustion gases into the living area, especially if the pipes are not fully extended outdoors or are obstructed [1][2]. - Many so-called energy-saving products available in the market, such as "energy rings" and "wind shields," are incompatible with gas appliances and can lead to incomplete combustion, increasing the risk of carbon monoxide exposure [2]. Group 2: Preventive Measures - It is crucial to avoid using dangerous gas appliances and to ensure proper ventilation in enclosed spaces to prevent carbon monoxide buildup [2]. - Regular checks of gas equipment and installations are essential to identify and eliminate potential hazards [2]. - Observing the color of the flame from gas appliances can indicate combustion efficiency; a blue flame indicates proper combustion, while yellow or red flames suggest incomplete combustion, necessitating immediate ventilation [2].