A 2-hour-old full-term newborn infant is noted to be having episodes of cyanosis and apnea，which are worse when he is feeded but are better when he is stimulated and cries.The most important next step to quickly establish the diagnosis is

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• A female student， aged 18 years，w ho fell on her buttocks in a bicycle accident presents with swollen soft tissue， hot skin， and tenderness in the left buttock. The doctor suspects inflammation， where the patient has traumatic inflammation besides bacterial infection. Which of the following is NOT among the possible pathologic responses?
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