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When using a thermometer to measure body temperature, ensure the accuracy and reliability of the thermometer and operate it correctly according to the instructions. At the same time, attention should be paid to safe use to avoid risks such as mercury poisoning caused by damage or misuse. If multiple people use the same thermometer, ensure thorough disinfection before each use.

When using a household thermometer correctly, ensure that it is clean and dry, and check for any damage. For a mercury thermometer, you should grab the end without a metal end, vigorously shake it a few times, and swing the mercury back to the head of the thermometer, so that the mercury scale is below 35 ℃. For electronic thermometers, it is necessary to check if the battery is charged, as insufficient power can affect the measurement results.