Correct Answer: C

Rationale: The correct answer is to maintain standard and contact precautions. RSV is highly contagious, primarily spreading through respiratory secretions. Therefore, it is crucial to implement infection control measures to prevent the spread of the virus within the healthcare setting. Option A is incorrect as warmth and dryness are not the primary concern in RSV management. While family support is important, allowing visits may increase the risk of spreading the infection, making option B less appropriate. Option D is incorrect because RSV is a viral infection, and antibiotics are not effective against viruses.

Correct Answer: C

Rationale: Visible peristalsis and weight loss are classic clinical manifestations of pyloric stenosis. The obstruction at the pyloric sphincter causes visible peristalsis as the stomach tries to push food through the narrowed opening, leading to the appearance of waves across the abdomen. Weight loss occurs due to poor feeding and frequent vomiting associated with pyloric stenosis. Choices A, B, and D are incorrect. Abdominal rigidity and pain on palpation, rounded abdomen and hypoactive bowel sounds, as well as distention of the lower abdomen and constipation are not typically seen in pyloric stenosis.

Correct Answer: A

Rationale: The correct answer is A: petechiae, infection, fatigue. In leukemia, bone marrow involvement leads to a decrease in normal blood cell production, resulting in petechiae (small red or purple spots on the skin), increased susceptibility to infections due to decreased white blood cells, and fatigue from anemia. Choices B, C, and D are incorrect because they do not directly relate to the typical signs and symptoms of leukemia with bone marrow involvement. Headache, papilledema, irritability, muscle wasting, weight loss, decreased intracranial pressure, psychosis, and confusion are not typically associated with leukemia and bone marrow involvement.

Correct Answer: B

Rationale: Antifungal agents are the appropriate treatment for candidal diaper rash as it is a fungal infection. Corticosteroids, antibiotics, and retinoids are not indicated for this condition. Corticosteroids may worsen fungal infections, antibiotics are used for bacterial infections, and retinoids are typically used for acne and skin conditions unrelated to candidal diaper rash.

Correct Answer: C

Rationale: Visible peristalsis and weight loss are classic clinical manifestations of pyloric stenosis. Visible peristalsis refers to the wave-like movements in the abdomen caused by the stomach trying to empty into the intestines due to the obstruction at the pylorus. Weight loss is often seen due to inadequate feeding and vomiting associated with this condition. Choices A, B, and D are not typical of pyloric stenosis. Abdominal rigidity and pain on palpation are more indicative of conditions like peritonitis. A rounded abdomen and hypoactive bowel sounds are more suggestive of conditions like constipation or bowel obstruction. Distention of the lower abdomen and constipation are not specific to pyloric stenosis and may be seen in various gastrointestinal issues.