Final answer:
Passive rewarming of a hypothermic patient, which includes the use of heat-packs or hot water bottles near the axillary and groin, is true and a recognized method for treating mild hypothermia.
Step-by-step explanation:
Passive rewarming of a hypothermic patient is a true and essential practice in the first-aid management of mild hypothermia. It involves methods that stimulate the body's natural heat generation processes without the direct application of external heat to the body's core.
Placing heat-packs or hot water bottles near the axillary (armpits) and groin regions can be part of a passive rewarming strategy because these areas have blood vessels close to the surface that can help in transferring heat to the core, aiding in raising the patient's body temperature. The axillary and groin areas are chosen because they have a high concentration of blood vessels close to the surface of the skin, allowing for efficient heat transfer.