While income worry is a rather common problem of the aged, _____1____. Of all thereasons that explain their loneliness, a large geographical distance between parents and their children is the major one. This phenomenon is commonly known as “Empty Nest Syndrome”（空巢综合症）. ____2____, many young people have gone abroad, leaving their parents behind with no clear idea of when they will return home. Their parents spend countless lonely days and nights, taking care of themselves, ____3____. The fact that most of these young people have gone to Europeanized or Americanized societies makes it unlikely that they will hold as tightly to the value of duty as they would have if they had not left their countries. ___4_____ This geographical and cultural distance also prs the grown-up children from providing response in time for their aged parents living by themselves. The situation in which grown-up children live far away from their aged parents has been described as “distant parent phenomenon”, which is common both in developed countries and in developing countries. ____5______. 1_____.