(adv.) In an accurate manner; exactly; precisely; without error or defect.

bang conscientiously correctly exactingly exactly exquisitely faultlessly flawlessly fussily in detail just right just so meticulously minutely nicely perfectly precisely properly punctiliously punctually refinedly right rightly rigorously scrupulously sharp sic smack-dab so spang square squarely straight strictly with exactitude with great nicety with precision