shǒu shù / guò chéng / zhōng / yī shēng / xū yào / fēi cháng / xiǎo xīn / de / chǔ lǐ / nǎo jiāng / zǔ zhī手术过程中,医生需要非常小心地处理脑浆组织。During the operation, the doctor must handle the brain tissue very carefully.