Neonatal Respiratory Distress Syndrome refers to progressive breathing difficulties and respiratory failure that occur shortly after birth in newborns, primarily due to a deficiency in pulmonary surfactant, leading to the progressive collapse of alveoli. The incidence is related to gestational age, with smaller babies being more susceptible.

A two-year-old child developed pulmonary hypertension after heart surgery. How should conservative treatment and observation be conducted?