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Diligent
Diligence is one of the seven heavenly virtues. Diligent behavior is indicative of a work ethic; a belief that work is good in itself.
Wikipedia
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Vigilant (adjective)
Watchful, especially for danger or disorder; alert; wary
“Be vigilant for signs of disease in your garden.”
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Diligent (adjective)
Performing with industrious concentration; hard-working and focused.
“Scientists are very diligent in their work.”
Wiktionary
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Diligent (adjective)
having or showing care and conscientiousness in one’s work or duties
“after diligent searching, he found a parcel”
Oxford Dictionary