How to measure body temperature correctly? thank you

It is suggested that the traditional mercury thermometer be used to measure the underarm temperature. Avoid drinking water, eating, exercising and bathing half an hour before temperature measurement, because these factors will lead to high body temperature. Dry your sweat with a clean towel before taking your temperature. Before measurement, throw the mercury thermometer below 35℃, put the probe completely in the middle of the armpit and clamp it close to the skin. After observing for 5- 10 minutes, you can take out the mercury thermometer and read the body temperature directly.