老家在平原,四周别说山,连个小土丘也没有。放眼望去,蓝天与土地交界处,总是一排淡绿色的树,在氤氲的水气里模糊着,小时候的我,便总要坐在门槛上,苦苦思索那已想了无数次的问题,树的后面是什么? The old home is in the plain, not to mention the mountains around it, not even a small mound. Looking ahead, at the junction of the blue sky and the land, there is always a row of pale green trees, blurred in the turbulent water. When I was a child, I would always sit on the threshold, thinking hard about what I had thought of. Question, what is behind the tree?