A 32-year-old man reports 1 week of feeling unusually irritable. During this time, he has increased energy and activity, sleeps less, and finds it difficult to sit still. He also is more talkative than usual and is easily distractible, to the point of finding it difficult to complete his work assignments. A physical examination and laboratory workup are negative for any medical cause of his symptoms and he takes no medications. What diagnosis best fits this clinical picture?

Nita is the office manager at a service station. two applicants, max and tim, arrive to interview for the open mechanic's position. max's clothes are dirty, his hair is unwashed, and he doesn't make eye contact when he gives nita his name. tim dresses in clean jeans and a nice shirt, is shaved, and shakes nita's hand when he introduces himself. after the interview, keith the head mechanic, asks nita what she thought. both men have the skill set needed for the position. nita recommends tim. she is responding to her perception of