Let's refer to that big book of God's word again and find the answer...
As free, and not using your liberty for a cloke of maliciousness, but as the servants of God." -- 1 Peter 2:15-16 "For so is the will of God, that with well doing ye may put to silence the ignorance of foolish men:
"For ye are bought with a price: therefore glorify God in your body, and in your spirit, which are God's." -- 1 Corinthians 6:20
"Whether therefore ye eat, or drink, or whatsoever ye do, do all to the glory of God." -- 1 Corinthians 10:31
And these things we do because it is by and for and through the will of God.
"For it is God which worketh in you both to will and to do of his good pleasure." -- Philippians 2:13
Precious instruction. Food for my thirsty soul. Thank you.
So, what are they accounting for? None of your verse answers why we account for our salvation if we are not instruments of it. None.
It's all automated in the Reformed theology; man is a rag doll dragged around at God's will. Some are discarded, some are saved. Rag dolls give no account of their fate.