Type A：Type A people are conservative and passive， and are concerned with appearances. Although type A people are superficial①. And have a touch of mental instability， they are very patient and finish what they start.
Type B：Type B people get along well withothers because they are straightforward②， and are noted③ for their creativity. But type B people are also moody④ and become bored and annoyed easily.
Type O：Type O people are stubborn⑤ and impulsive⑥.Their redeeming⑦ quality is that they are loyal to their friends.
Type AB：Type AB people are indecisiveand picky⑧. They tend to be demanding⑨ and impatient， and they have trouble seeing things through.
Despite any real evidence to support these ideas， Takeji’s theory quickly caught on⑩. By 1930， standard job application forms included a blank for blood type， and today market researchers use it to predict buying habits， and ordinary people use it to choose friends and romantic partners.
① superficialadj.肤浅的
② straightforward adj.坦率的、正直的
③ noted adj.著名的
④ moody adj.喜怒无常
⑤ stubborn adj.顽固的、固执的
⑥ impulsive adj.冲动的
⑦ redeeming adj.补偿的
⑧ pickyadj.好挑剔的
⑨ demanding adj.苛求的
⑩ catch on流行
个人血型和性格之间的关系
A型的人保守、被动，在意外表。 A型的人虽然肤浅、精神有点不稳定，但他们很有耐性，而且会坚持把他们开始的工作做完。
B型的人和别人处得好，因为他们很直率，并以他们的创意闻名。但是B型的人也很情绪化，很容易觉得无聊、觉得烦。
O型的人顽固、冲动。作为补偿的气质，是对他们的朋友很忠诚。
AB型的人犹豫不决、爱挑剔。他们比较苛求、没耐性，他们没办法坚持到底。
不管有没有任何支持这些想法的实证，竹二的理论很快流行起来。到了1930年，标准的工作申请表已经包括了填写血型的空格，现在的市场调查员用这种方法来预测购买习惯，普通人则用它来选择朋友和情人。