ACL stands for anterior cruciate ligament, which is one of the four main ligaments in the knee joint. The ACL connects the thighbone (femur) to the shinbone (tibia) and helps to stabilize the knee during activities such as running, jumping, and pivoting. An ACL injury is a common sports-related injury that can occur when the ligament is stretched or torn due to sudden twisting or impact on the knee joint. Treatment for an ACL injury may include physical therapy, bracing, or surgery depending on the severity of the injury and individual circumstances.
![local s = ""
local sstr = string.gmatch(s,'href%s*=%s*"([^"]+)"')
print(sstr()) 增加一个功能，左右两边可以是双引号或者单引号](https://linuxcpp.0voice.com/zb_users/upload/2023/05/202305162224299866311.png)
![local s = ""
local sstr = string.gmatch(s, 'href%s*=%s*["\']([^"\']+)[\'"]')
print(sstr()) 增加一个功能，开头可以是href、src、action](https://linuxcpp.0voice.com/zb_users/upload/2023/05/202305162217558813401.png)
