A 2-day-old neonate becomes lethargic and uninterested in breastfeeding. Physical examination reveals tachypnea (rapid breathing) with a normal heabeat and breath sounds. Initial blood chemistry values include normal glucose, sodium, potassium, chloride, and bicarbonate (HCO3-) levels; initial blood gas values reveal a pH of 7.53, paial pressure of oxygen (PO2) normal at 103 mmHg, and paial pressure of carbon dioxide (PCO2) decreased at 27 mmHg. Which of the following treatment strategies is indicated?