Baby Matthew – that’s his real name; he was born in India, the “baby” in a family of six – hasn’t had a day off in four years. “I work a lot,” he said with a laugh. Matthew, 63, is an operating room nurse at Central Maine Medical Center in Lewiston. His other “job,” for which he volunteers 30 to 40 hours a week, is overseeing the food pantry at the First Assembly of God church in Portland. “He pours his life into it, and every week I think ‘How can he keep going,’ ” said his wife, Barbara, who also volunteers in the food pantry.