Final answer:
The most accurate place to check body temperature is the ear canal using an infrared ear thermometer, which provides a quick and reliable temperature readout, essential for accurate medical assessments.
Step-by-step explanation:
The most accurate place to check body temperature is the ear canal using an infrared ear thermometer. These modern thermometers are more accurate compared to traditional alcohol thermometers placed under the tongue or in the armpit. With the use of infrared thermometers, you can get a quick and accurate temperature readout which is crucial in medical assessments, as even a small uncertainty can lead to misdiagnosis or mistreatment. For instance, an uncertainty of 3.0°C in temperature readings could make a thermometer practically useless. Therefore, the precision of an ear thermometer, especially in sensitive cases such as monitoring ovulation or detecting fevers, is invaluable.