hěn duō shí hou shì yīn wèi shè bèi zhuān kē huò bìng qíng fù zá dù xū yào gèng hé shì de yī yuàn

很多时候是因为设备、专科或病情复杂度需要更合适的医院。

Often it's because the equipment, specialty, or complexity of the condition requires a more suitable hospital.