scrupulous

scrupulous [ SKROO-pyuh'-luh's ]
[ adjective ]

MEANING :
1. principled or having a strict regard for what one considers right
2. painstaking or minutely careful

USAGE EXAMPLE 1 :
The young executive was rewarded by the company for his scrupulous performance during the year.
USAGE EXAMPLE 2 :
Charles Wheeler was a scrupulous reporter who tirelessly pursued the truth.