Evaluation of clinical effect of eating bird's nest on relieving female climacteric syndrome

INTERVENTION: Control group:Eat 1 bowl of swallow containing placebo every day (no effective ingredients, the appearance and taste are the same as those in the experimental group);Low dose group (L‐EBN group):Eat 1 bowl of swallow containing 3.0g of bird's nest solids every day.;High dose group (H‐EBN group):Eat 1 bowl of swallow containing 6.0g of bird's nest solid every day; CONDITION: Decline in ovarian reserve function PRIMARY OUTCOME: Variation of average daily hot flashes;Improved Kupperman score;Safety index;Uterus and vagina health (Abdominal Ultrasound);Serum index; INCLUSION CRITERIA: 1. Women meeting the diagnostic criteria for decreased ovarian reserve function have a basal FSH level greater than 10 U/L, or an AMH level less than 1.1 µg/L. 2. The patient has obvious clinical manifestations of hot flashes and excessive sweating, with an average number of hot flashes and sweating episodes in 7 days >= 3 times per 24 hours in the past. 3. Natural menopause has occurred for >= 12 months. 4. BMI ranges from 18 to 38 kg/m^2.