So begin the trials and tribulations of the irascible Alexander, who has been earning the sympathy of readers since 1972. People of all ages have terrible, horrible days, and Alexander offers us the cranky commiseration we crave as well as a reminder that things may not be all that bad. As Alexander's day progresses, he faces a barrage of bummers worthy of a country- western song: getting smushed in the middle seat of the car, a dessertless lunch sack, a cavity at the dentist's office, stripeles