94．As vitamins became recognized as essential food constituentsnecessary for health，it became tempting to suggest that every disease and condition forwhich there had been no previous effective treatment might be responsive tovitamin therapy．

(复合句：as从句，主句中的it是形式主语，不定式结构to suggest that…是真正的主语，that引导的宾语从句的主干是every disease andcondition…might beresponsive to vitamin therapy)

由于维生素被认为是健康必需的食物成分，所以过去无有效疗法的每种疾病和状况都可能会对维生素疗法起反应这一建议变得很有吸引力。

分句1：As vitamins became recognized asessential food constituents necessary for health

分句2：it became tempting to suggest

分句3：every disease and condition mightbe responsive to vitamin therapy．

分句4：for which there had been noprevious effective treatment

3和4嵌套，4修饰3中的disease and condition

2和3嵌套，2和3构成宾语从句

1和2并列