This could be an older block that doesn't follow the pattern of BlockBegin's handle starting at 1 above the blockhandle.
这是老版本生成的块，不能随父节点在块开始点1之上找到块关联句柄。
2
To handle medication non-compliance, you would add an otherwise interaction block, as shown in Figure 9.
要处理患者不遵从医嘱的情况，需要添加一个不同的交互块，如图 9 所示。
3
You still need to handle this exception of course, but writing a catch block to handle a detected error is much simpler than writing code to detect all possible errors.