Therapeutic management of children with Hirschsprung's disease includes:

Rationale:
A. Avoiding contact sports is important long-term, but it is not the immediate priority for an unstable slipped capital femoral epiphysis (SCFE).
B. While limited weight-bearing is essential, prolonged wheelchair use is typically only required until surgical stabilization, not as a permanent measure.
C. Ice or heat applications provide minimal benefit for SCFE; they do not address the mechanical instability of the hip.
D. Surgical repair is the definitive treatment for an unstable SCFE. Prompt surgical intervention, usually in situ pinning, is necessary to prevent further slippage, reduce the risk of avascular necrosis, and restore hip stability. Early recognition and timely surgery are critical components of anticipatory guidance for the patient and family

Rationale:
A. Pulmonary valve stenosis typically produces a systolic ejection murmur, not a continuous machine-like murmur.
B. A venous hum is continuous but usually heard over the right or left supraclavicular area and is benign.
C. Patent ductus arteriosus (PDA) classically produces a continuous, “machine-like” murmur best heard at the upper left sternal border. The murmur persists throughout systole and diastole due to continuous blood flow from the aorta to the pulmonary artery.
D. A ventricular septal defect usually produces a holosystolic murmur heard best at the lower left sternal border, not a continuous machine-like murmur.