fussily — excessively busy with trifles; anxious or particular about petty details.
dogmatically — relating to or of the nature of a dogma or dogmas or any strong set of principles concerning faith, morals, etc., as those laid down by a church; doctrinal: We hear dogmatic arguments from both sides of the political spectrum.
inflexibly — not flexible; incapable of or resistant to being bent; rigid: an inflexible steel rod.
fastidiously — excessively particular, critical, or demanding; hard to please: a fastidious eater.
scrupulously — having scruples, or moral or ethical standards; having or showing a strict regard for what one considers right; principled: scrupulous about defending human rights.
particularly — in a particular or to an exceptional degree; especially: He read it with particularly great interest.