案例:黑龙江省林甸县某村有位74岁的张老太,老伴儿是乡中心校的一名退休教师,他有两个儿子,大儿子是个本本分分的庄稼人,二儿子有车,搞运输。虽然张老太没有工作,可老伴儿每月有四五千元的养老金,寒暑假还收学生办班,搞辅导,她手中没缺过钱。天有不测风云。一个冬季的雪天,张老太的二儿子去邻 Case: Zhang Laotai, a 74-year-old village in a village in Lindian County, Heilongjiang Province, is a retired teacher from the township school. He has two sons and his eldest son is a farmer who is divided into books. The second son has a car, Engage in transportation Although Mrs. Chang does not have a job, her husband and child can have four or five thousand yuan per month pension, winter and summer holidays also receive students to do classes, counseling, her hands did not lack money. Accidents will happen. A winter snow, Zhang Granny’s second son to the neighbors