Luke had two reasons for doing so.
Firstly, he had a lot of things to deal with after the battle. Every time he allocated stat points to his basic stats, it was a good opportunity to observe the changes to his body and the system. He couldn't waste it.
Secondly, his Dexterity was about to hit 40, which was a critical juncture.
He still remembered how it felt when his Strength and Mental Strength broke 40.
When his Dexterity reached 40, his body would react violently, and he might be unable to continue fighting.
Hence, by the time he was done sorting things out, two days had passed.
That afternoon, Luke and his clone arrived at the New Hope lab in Nassau County. Entering his private basement, he took out the medical A.I. program, Osiris, and various instruments and medication from his inventory.
"Osiris, check the instruments and the meds. Once you're prepared, we'll get started," he said.
"Yes, sir," replied Osiris.