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稱量45日齡的小兔，體重應在0.75公斤以上，不能購買低于此標準的小兔。

A 45 day old rabbit should weigh at least 0.75 kilograms and should not be purchased below this standard.

看起來個頭大，四肢強壯，體形勻稱，眼睛清亮，動作敏捷，是好兔，切忌買有疥螨病或生理缺陷的長毛兔。

It looks big, with strong limbs, a symmetrical body shape, clear eyes, and agile movements. It is a good rabbit, and it is important not to buy a long haired rabbit with scabies or physiological defects.

看兔毛。長毛兔的毛以純白色，濃密，細長為佳。判別法：用手指在長毛兔背上拔除少量兔毛，觀察兔毛的顏色、粗、長等情況。

Look at rabbit fur. The fur of a long haired rabbit should be pure white, dense, and slender. Discriminant method: Use your fingers to remove a small amount of rabbit hair from the back of a long haired rabbit, and observe the color, thickness, and length of the rabbit hair.

辨公母鑒別幼兔的公母應查看其生殖孔。具體地說：用右手抓取兔頸皮膚，左手托住兔臀，用手指按壓兔陰部。若緊貼肛門下方有與肛門大小相似的扁形孔穴，說明是一只母兔;若孔穴較圓，距離肛門稍遠，說明是一只公兔;

To distinguish between male and female rabbits, one should examine their reproductive pores. Specifically, grab the skin of the rabbit's neck with your right hand, hold the rabbit's buttocks with your left hand, and press the rabbit's genitals with your fingers. If there is a flat hole closely below the anus that is similar in size to the anus, it indicates that it is a female rabbit; If the hole is relatively round and slightly far from the anus, it indicates that it is a male rabbit;

分齡法是根據長毛兔趾甲的顏色和形態來判斷其年齡。指甲的基部呈粉紅色，尖部呈白色，1歲兔趾甲上的紅色與趾甲上的白色基本相等，1歲以上的兔趾甲上的白色多于紅色。年輕兔子的趾甲短而平直，隱約可見;中年兔子的趾甲銳利而顯露;老年兔子的趾甲顯露出1/2的毛外。

The age classification method is to determine the age of a long haired rabbit based on the color and shape of its toenails. The base of the nails is pink, and the tips are white. The red color on the toenails of 1-year-old rabbits is basically equal to the white color on the toenails. The white color on the toenails of rabbits over 1 year old is more than red. The toenails of young rabbits are short and straight, faintly visible; The toenails of middle-aged rabbits are sharp and exposed; The toenails of elderly rabbits show half of their fur.