题目

Stress is a physical and mental feeling which breaks the physiological balance. A major source of teen stress is school exams, and test anxiety is not uncommon. So, how can parents help their teens go over it before an exam?     —Be involved.     Parents need to be involved in their teen's work. What they look for is your presence — to talk, or simply to sit with them quietly. Communicate openly with your teen. Encourage your teen to express his/her worries and fears.     —Help them get organized.     Help your teen think about what he/she has to study and plan accordi设函数.（1）解不等式；（2）若，使得，求实数的取值范围.