The specific aetiology of this syndrome is unknown, and there is no single diagnostic test. 该症候群的明确病因或特殊行为模式仍然未知，也没有单一的诊断方式。
Also a local error diagnostic method was presented on error sub-sequence, which was not restricted to single error assumption and more practical. 同时，提出了一种基于错误子列的局部错误诊断方式，突破了单一错误假设的局限，更具实用价值。
