" to act upon her low body temperature and set about returning it to normal" could be simplified since by returning her body temperature to normal you are acting upon it. However , it's only a minor point as the grammar seems okay
It is understandable but if it's an academic assignment though, aelmpvw, some students may have been told to improve their grammar in these assignments, so it's understandable if ilovemarkb wants some advice.
I must make that slight error quite often then as I would say "to act upon her low body temperature and set about ..." - I'd omit the TO on the basis that it was 'given'.
Is that just a style issue, Tilly, or is it bad grammar to omit the second 'to'?
Me sibton? More a discussion than an argument. I know Tilly knows her stuff and just wondered whether my usual style of writing was not grammatically correct.
"The plan is to sing, to dance and to have a good time." is fine for emphasis or dramatic effect but there is no need to have more than the single "to" if it is a simple statement of fact.