zhè / xiàng / yán / jiū / cǎi / yòng / shuāng / máng / shè / jì / yǐ / jiǎn / shǎo / zhǔ / guān / yīn / sù / de / yǐng / xiǎng这项研究采用双盲设计,以减少主观因素的影响。This study uses a double-blind design to reduce the influence of subjective factors.