The north end of Acushnet Avenue is triple-deckers and small deep yards, and a small yard shows every shortcut. AT YOUR SERVICE mows those lots on a rhythm, trims the narrow strip between one fence and the next, and edges the front walk so the grass stops in a straight line instead of creeping over the concrete. Spring means clearing off whatever winter left behind; fall means staying ahead of the leaves week by week rather than all in one exhausting afternoon. New Bedford summers run humid and green, and grass in this city rewards anyone who keeps showing up. The reward, block by block, is a street that looks looked-after.