Comedian Rodney Dangerfield has left Hollywood (Fla.) Memorial Hospital after a series of undisclosed tests. As he left the hospital Friday Dangerfield, 69, would not stop and talk to reporters, but said, "Everything's all right." The jittery comedian who constantly tugs at his necktie and tells jokes about the lack of respect he gets from family and friends admitted himself into Hollywood Memorial Tuesday night. He was in south Florida for a New Year's Eve performance at the Sunrise Musical Center.