Q. In Canada we have a province that is almost always abbreviated as B.C.. When using it at the end of a sentence do you add the period (as I just did), or leave it as is? Without the period, it looks like a run-on sentence, but with the period it looks like too many dots.

A. One period is enough. Check it out in printed books and magazines and newspapers: you probably won’t find any double periods after abbreviations. I wouldn’t worry about readers getting confused; we’re used to taking cues from the context.