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Earliest would be 72, but you no longer have the opportunity after 79.
ASAP (as soon as possible) should convey the same meaning
Not necessarily but it is something that the doctor should examine at your earliest opportunity.
Most Polices indicate that the Homeowner report all losses at the earliest opportunity
If you find yourself in a bus lane you should move to another lane at the earliest opportunity; if you do not do so you can be ticketed.