Slavishly

He has attempted no slavishly literal reproduction.

I'm not obligated to slavishly submit to my desires.

Although the words were not slavishly borrowed, the expressions partook of the simple dignity of the liturgy to which she had been accustomed, and was probably as worthy of the Being to whom they were addressed as they could well be made by human powers.

"Railways seldom slavishly followed styles to be seen in the mainstream of contemporary architecture," HE [Historic England] explains.