患过敏性疾病，应认真分析病因，这对诊断有重要意义。
Suffering from allergic diseases, should be careful analysis of causes, the diagnosis is important.
研究人员指出，很多研究已经发现长子(长女)患过敏性疾病的风险最大。
A number of studies have found oldest children are at greater risk of allergic diseases, the researchers note.
研究人员指出，很多研究已经发现长子(长女)患过敏性疾病的风险最大。
A number of studies have found oldest children are at greater risk of allergic diseases, the researchers note.
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