所(suǒ )以我都是(shì )尽(jìn )可能的把马(mǎ )儿用到体力(lì )接(jiē )近干(gàn )涸才(cái )会去换掉或者(zhě )重新买一包草料让马儿回(huí )复(fù )体力,从(cóng )经济姓的原(yuán )则來说,正(zhèng )常的话(huà ),还(hái )是买(mǎi )草料划算一点,挥动马鞭,对着(zhe )马屁股就是一鞭子(zǐ ),只听得(dé )马(mǎ )儿一声长嘶,系统马(mǎ )匹撒开了蹄子便飞奔而出,身后(hòu )的笑(xiào )妹子(zǐ )也不甘示弱,对着马屁股也是一鞭,马儿(ér )纵身一跃,差点沒把她摔下马去,