阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。
Now, AI(人工智能)is smart enough to check loneliness (孤独) in humans.
A new study(1)_______ (show) how AI can know the degrees of loneliness from a (2)_______ (person) words. 80 people aged 66 to 94 took part (3)______ the study because they often felt lonely. They were asked 20 (4)______(question), such as “How often do you feel lonely?” and “How often do you get together with your friends?”
The interesting thing is (5)_______it uses dictionary-based methods. For example, it can (6)______ (look) for words to show fears. It also gives answers (7)_______testing their words. If people felt lonelier, their answers about loneliness were (8)________ (long). It can know the degrees of loneliness in each topic. It also shows (9)_______ (difference) between men and women. If a man felt lonely, he used more words to show his fears. If a woman felt lonely, she expressed her lonely feelings (10)________(direct).