He had wanted to write ____children's book for many years, but one thing or another always got in _________ way.
动画片《西游记》的片尾曲“白龙马，蹄朝西，驮着唐三藏跟着三徒弟，西天取经上大，一走就是几万里……”，其中“西天”指的是（ ）
读印度信息图，回答有关问题．
