Never leave a cold pack on for more than 20 minutes at a time. Reducing the temperature in that area for an extended period of time signals the body to increase blood flow to raise the body temperature! Therefore, one accidentally triggers(引起) more blood distribution to the affected area by leaving a cold pack on for too long! Finally, bandage the angle. Be careful not to wind it too tightly; doing so can restrict blood flow and cause harm to the entire foot.
41. A sprain is caused by
Aligament fibers of a joint being twisted
Bblood vessels being hurt in the foot
C constantly changing body temperature
D elevating ones ankle
42. The black-and-blue symptom of a sprain is due to
A bleeding under the skin
B pressing ones ankle
C a tight bandage
D applying a cold pack
43 The word it in paragraph 2(line5) refers to
Aankle
B injury
C pressure
D swelling
44. Once the initial cold pack is removed, what is to be done?
A Begin bandaging the ankle
B Wait 30 minutes and then reapply the ice pack for 20 minutes
C Keep the ankle in a position lower than your heart
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