Scrupulously
punctiliously, conscientiously, meticulously, exactly, rigidly, correctly, strictly, precisely, minutely, painstakingly, faithfully, trustily, fastidiously, uprightly, honorably, attentively, rigorously, providently, deliberately, fully, reliably, particularly, solicitously, concernedly, laboriously, thoroughly, dependably, in detail, with completeness, nicely, with care, with every care, in a thoroughgoing manner, to a hair*; see also accurately.
Antonyms neglectfully, haphazardly*, indifferently, carelessly.
Cautiously
prudently, discreetly, warily, guardedly, circumspectly, providently, watchfully, vigilantly, sparingly, frugally, thoughtfully, heedfully, regardfully, mindfully, with care, with caution, with difficulty, gingerly, delicately, noncommittally, anxiously, with forethought, with reservations.
Antonyms imprudently, foolishly*, wastefully.