Date-Time-Range.md

@@ -237,13 +237,13 @@ Get the real range period while considering the threshold.
 ((period.min - threshold)..(period.max + threshold))
 ```
 
-#### `:real_start` as `.period_real_start`
+#### `:real_start` as `.period_real_start` **(ONLY WITH THRESHOLD)**
 Get the beginning of the period while considering the threshold.  
 ```ruby
 period.min - threshold
 ```
 
-#### `:real_finish` as `.period_real_finish`
+#### `:real_finish` as `.period_real_finish` **(ONLY WITH THRESHOLD)**
 Get the ending of the period while considering the threshold.  
 ```ruby
 period.max + threshold