Measuring body temperature in an air-conditioned room is also accurate because people are constant temperature animals and are not affected by the outside ambient temperature, unless the outside temperature is too high or too low. The temperature in an air-conditioned room does not vary too much, so the measurement of body temperature is more accurate. The methods of measuring body temperature are axillary temperature measurement, oral temperature measurement and anal temperature measurement. Among them, axillary temperature measurement is the most simple and easy to use, while anal temperature measurement is the closest to the body temperature. The normal range is between 36-37.3℃. Use the mercury thermometer clamped in the armpit of a person, clamped for more than 5min and then take out the reading, before measuring to pay attention to the armpit sweat dry.