For whom can one fulfill the Purim mitzvah of matanot la’evyonim (gifts to the poor) but not the mitzvah of mishloach manot (food gifts)?

This source-based Torah study examines the question: For whom can one fulfill the Purim mitzvah of matanot la’evyonim (gifts to the poor) but not the mitzvah of mishloach manot (food gifts)? The canonical Hebrew article develops the issue through Parashat Mishpatim and the sources cited there. This localized discovery layer preserves the question and the source identity; it does not add any new halakhic, medical, legal, scientific, historical, theological, or empirical ruling or claim beyond the canonical Hebrew source.