The task is clear as the Milwaukee Bucks play at Boston in game-two of their first-round N-B-A playoff series.  They can’t make 20 turnovers and they can’t allow the Celtics 22 second-chance points.  Even bigger, Giannis Antetokounmpo and Khris Middleton need to get some offensive help.  John Henson did block six shots, but he was a no-show when it came to scoring.  Jabari Parker contributed just two points on one-of-five shooting after averaging 12-and-a-half points and five rebounds-a-game.  Coach Joe Prunty says the improvements will come on hustle plays.  Milwaukee will try to tie the series at a game apiece tonight at 7:00 P-M at the T-D Garden.