【分析解答题】

It is when the feet weary and-hope seem s vain that the heartaches and the longings arise. Know, then, that for you is neither surfeit nor content. In your rocking-chair, by your window dreaming, shall you long, alone. In your rocking-chair, by your window, shall you dream such happiness as you may never feel.

Questions:
A、Identify the author and the work.
B、What does the rocking-chair symbolize