St.Quentin said rather vaguely : "How annoying for you!" He had screwed round his head inside the folds of his scarf, to consider Anna with abstract attentiveness. For she had this little way of travestying herself and herself-pities, till the view she took of herself, when she was with him, seemed to concert exactly with the view he took of her sex.
These are sentences from "the Death of the Heart" by Elizabeth Bowen
Before the sentences, St.Quentin and Anna are talking about Anna's sister-in-law. (Anna and St. Quentin are friends.) Anna complains about her sister-in-low, then above sentence come.
I want to know the meaning of abstract attentiveness.