yī / shēng / jiàn / yì / jiǎn / chá / cuī / rǔ / sù / shuǐ / píng / yǐ / liǎo / jiě / mì / rǔ / wèn / tí医生建议检查催乳素水平,以了解泌乳问题。The doctor recommended checking prolactin levels to understand the lactation problem.