If an abbreviation next to a period ends a sentence, you do not obligation to add a sentence-ending extent. However, do include other end-of-sentence punctuation (like punctuation marks and give somebody the third degree marks), as necessary.
no One length is all that is to say needed.
I asked that same examine.
No, still one.
Use a extent with abbreviation:
Dr. Espinoza arrived from Washington, D.C., at 6 p.m.
Notice that when the period climax the abbreviation comes at the conclusion of a sentence, it will also suffice to end the sentence. On the other appendage, when an abbreviation ends a give somebody the third degree or exclamation, it is appropriate to add a cross-examine mark or exclamation speck after the abbreviation-ending period: Source(s):