Obsessively

It is sickness to be obsessed with winning, it is sickness to be obsessed with using the martial arts, and it is sickness to be obsessed with putting forth all one has learned. It is sickness to be obsessed with offense, and it is also sickness to be obsessed with defense. It is also sickness to be obsessed with getting rid of sickness. To fix the mind obsessively on anything is considered sickness.

Yanni ruminates obsessively about assholes.

There's a website where people stalk Tom obsessively.

There were moments when I doubted whether it was worth all the effort – whether it was crazy of Anderson to toil so obsessively over three breezy, cheeky vignettes which are neither sidesplittingly hilarious nor heart-wrenchingly insightful.