Final answer:
The recommended position for postural drainage of the bilateral apical lung segments in a child is Trendelenburg position.
Step-by-step explanation:
The recommended position for postural drainage of the bilateral apical lung segments in a child is Trendelenburg position. This position involves the person lying on their back with the head lower than the feet. It helps to drain secretions from the apical segments of the lungs by using gravity to assist in the removal of mucus.