n.妄想症，偏执狂，(对别人的)无端恐惧，多疑

She developed a paranoia after her best friend suddenly disappeared, suspecting everyone around her of involvement.
她在最好的朋友突然消失后变得多疑，怀疑身边所有人都与之有关。
His paranoia grew stronger as he became convinced that his company was being spied on by a rival firm.
随着他确信自己的公司正被竞争对手监视，他的疑心病愈发严重。
Paranoia is a mental state characterized by an excessive and irrational fear of being betrayed or persecuted.
疑神疑鬼是一种心理状态，表现为对被背叛或迫害的过度且不合理的恐惧。
The patient's paranoia made it difficult for them to trust their own thoughts, let alone anyone else's advice.
这位患者的疑心病使他们很难相信自己的想法，更别提别人的建议了。
Her paranoia about germs led her to wash her hands multiple times a day, even after touching common surfaces.
她对细菌的过度担忧促使她一天洗手多次，哪怕碰过常见的物体。
His paranoia was so intense that he hoarded food and supplies, fearing a doomsday scenario.
他的疑心病到了极致，囤积了大量的食物和物资，以防末日来临。
The paranoid schizophrenic believed that the government was monitoring his every move through his television.
这位偏执型精神分裂症患者坚信政府通过电视监控他的每一步。
The therapist tried to reassure the paranoid client that their fears were unfounded, but it was a challenging task.
心理咨询师试图让这位疑虑重重的客户明白他们的恐惧没有根据，但这是一项艰巨的任务。
In the novel, the protagonist's paranoia fueled his obsessive search for hidden conspiracies within society.
在小说中，主角的疑心导致他对社会中的隐藏阴谋产生了病态的追求。
After a series of strange occurrences, the villagers began to develop a collective paranoia about a supernatural presence in their midst.
经过一系列奇怪的事情后，村民们开始集体产生对身边有超自然存在的恐慌。