Which clients are at high risk of sustaining cold injuries after exposure to cold temperatures?

Clients who are hypoglycemic are at high risk of sustaining cold injuries after exposure to cold temperatures primarily due to the body's reduced ability to generate heat. Hypoglycemia indicates low levels of glucose in the blood, which is a crucial energy source for maintaining bodily functions, including thermoregulation. When the body lacks adequate glucose, the energy generation required to produce heat diminishes, making it more susceptible to the effects of cold.

In colder conditions, individuals without sufficient energy reserves struggle to maintain their core body temperature, increasing the risk of cold-related injuries such as frostbite and hypothermia. In contrast, other categories mentioned, such as those on antibiotic medication, individuals who have had recent surgeries, or well-nourished clients do not inherently suggest a compromised ability to maintain body heat in the same direct manner as someone dealing with hypoglycemia. Therefore, the individual who is hypoglycemic stands out as particularly vulnerable to cold injuries due to their impaired thermoregulation capacity.