researchr建设地点：+。 result

This regular expression pattern will search for either "建设地点：" followed by any characters until the next "。" (period), or a "," (comma), or a "|" (pipe character) in the "result" string.

Here's an example of how to use this regular expression in Python:

import re

result = "The construction site is located at: Beijing, China."
match = re.search(r"建设地点：(.+?)。|，|", result)

if match:
    if match.group(1):
        location = match.group(1)
        print("Construction site location:", location)
    elif match.group(0) == "，":
        print("Comma found")
    elif match.group(0) == "|":
        print("Pipe character found")
else:
    print("No match found")

In this example, if the regular expression matches "建设地点：(.+?)。", the construction site location will be extracted and printed. If the regular expression matches a comma ",", it will print "Comma found". If it matches a pipe character "|", it will print "Pipe character found". If there is no match, it will print "No match found"