Correct Answer: B

Rationale: Repositioning every 2 hours is crucial in preventing skin breakdown in an edematous child on bed rest. This intervention helps redistribute pressure and maintain skin integrity, reducing the risk of pressure ulcers. It is an essential part of care for patients with limited mobility to ensure their comfort and prevent complications related to immobility.

Correct Answer: B

Rationale: The correct answer is B. Osteomyelitis of the tibia typically requires antibiotic therapy for at least 4 weeks. Surgery may be necessary if the infection does not respond to antibiotics. Weight-bearing should be avoided with osteomyelitis to prevent complications. Choices A, C, and D are incorrect because a cast until healing, returning to sports immediately, and contact isolation are not primary management strategies for osteomyelitis.

Correct Answer: B

Rationale: Repositioning every 2 hours is crucial in preventing skin breakdown in an edematous child on bed rest. This intervention helps redistribute pressure and maintain skin integrity, reducing the risk of pressure ulcers. It is an essential part of care for patients with limited mobility to ensure their comfort and prevent complications related to immobility.

Correct Answer: C

Rationale: The correct answer is C: 'Dry, hacking cough.' A dry, hacking cough is a classic manifestation of pertussis. Pertussis typically presents with symptoms of an upper respiratory tract infection, starting with a persistent, severe, and uncontrollable cough that can worsen at night. This cough is often followed by a high-pitched 'whoop' sound as the patient tries to catch their breath, hence the term 'whooping cough.' In contrast, options A, B, and D are not typically associated with pertussis. Inflamed throat with exudate may suggest a bacterial throat infection like streptococcal pharyngitis, purulent eye drainage is more indicative of a bacterial conjunctivitis, and Koplik spots on the buccal mucosa are specific to measles. Therefore, recognizing the dry, hacking cough as a manifestation of pertussis is crucial for early identification and appropriate management of the disease.

Correct Answer: B

Rationale: The recommended sleep duration for adolescents aged 14-17 is 8-10 hours to promote optimal health. Getting enough sleep is crucial for their physical and mental well-being, as it supports growth, development, learning, and overall health.