Student or Learner
Instead of saying "deal with the worlds of things and ideas on an individual basis ", does saying like the underlined imply you want to emphasize "on an individual basis? Why was it inversed and inserted? It may be a writing style, but I guess it's for emphasis by breaking some stereotype rule.
mo2-36)People with an internal style tend to be introverted and taskoriented. At times they also lack interpersonal awareness. (A) , people with an external style tend to be more extroverted, peopleoriented, and interpersonally more aware. Some people prefer to work alone and to deal on an individual basis with the worlds of things and ideas. Other people prefer to work with others and to deal with the world of people. (B) , most people are not strictly one or the other style, but alternate somewhere between them,
There is no rule. The person who wrote that might well have chosen a different word order if s/he had woken up an hour earlier/later.