Whether that's creating new Alexa capabilities with the Alexa Skills Kit (ASK), building devices that use Alexa for new and novel voice experiences using the Alexa Voice Service (AVS), or something else entirely, if you have a visionary idea, we'd love to talk to you.
The definition of 'proximity' is 'the state of being near, next, or close'. 'Distance' or 'remoteness' are antonyms of 'proximity'. Using 'close', while redundant, is reinforcing the rarer word. Just because people do it often doesn't mean it makes sense; those people 'could care less'.
Reference range. In health-related fields, a reference range or reference interval is the range of values for a physiologic measurement in healthy persons (for example, the amount of creatinine in the blood, or the partial pressure of oxygen).