A.
击球时,需要注意引拍和挥拍击球两个过程 。 When blocking the ball, pay attention to backswing and swing.
B.
击球后,调整身体重心并迅速还原。After block, adjust your body weight and recover fast.
C.
击球后,不需要做任何调整动作。After block, there is no need to make any adjustments.
D.
击球前,需要做好准备姿势。Before hitting, get a good ready position.