正则表达式贪婪匹配问题

let s = '甲状腺组织一块，大小约4cm×3.8cm×1.5cm，切面见一个灰白色边界不清肿物，大小约1.5cm×1.4cm×5cm'
let p = /甲状腺.*?肿物.*?大小.*?(\d+\.?\d?)cm/;
if s =~ p{
println($1);
return $1;
}else{
return nil;
}

输出：5
使用java Pattern类匹配返回的是1.5
问题：是不是不支持非贪婪匹配？

Start by running the script in the issue and compare its regular-expression result with Java Pattern using the same input and pattern. Trace AviatorScript's regex matching implementation to determine why the lazy expression captures 5 instead of 1.5. Done means the behavior matches the reported expectation or the discrepancy is clearly documented.

Written by the indexing model from the issue text.