Riverside County and San Bernardino County to the north form this metro area. Like many such metro areas in the Southwest, it extends far into uninhabited desert areas, in this case east through the Mojave Desert to the Nevada/Arizona border. Larger than nine U.S. states, it is often referred to as the Inland Empire.
I agree with tchrist that the word doctor in doctor appointment is a noun (attributive noun I believe), although the definition of an attributive noun is a noun used as an adjective, so maybe it's just semantics at some point.
If an officer was appointed before commencement to be a personâs CO in. relation to a particular matter, and that appointment was still in effect immediately. before commencement, the officer is that personâs commanding officer for general. purposes in relation to the particular matter after commencement.