NEAR PETROLIA, California, up in the state's fabled Lost Coast area. Once a year the Ask Dr. Hal! Show's own Dr. H. Owll retires there to contemplate the Beauties of Nature. Laughing, walking unencumbered, splashing in the pools and the ever-fresh Mattole River, the fairest of the fair give him strength, armored by such memories, to return to the gritty city and its struggles. Shows like this can result.