A bench in the park is all about the reason why the number of bird droppings is the instant solution. 1 there are more bird droppings on the bench, 1, and people cleaning the bird droppings 2. Why is there more bird droppings on this bench? Because there are trees near the bench, birds fall on trees, so they produce bird droppings. 2. Cut down the trees; 3. Find someone to drive the birds. 3 there are trees beside other benches. Why do birds always fall on this tree instead of on other trees? Because there are many insects on this tree, and there are few insects on other trees. 4. Spraying insecticides. 4 Why are there many insects on this tree, and there are few insects on other trees? Because there's a street lamp beside this tree that sucks a lot of insects at night. 5. Remove the street lamp (chair). As a park manager, which scheme would you choose? The answer is obvious: the first to the fourth solutions do not find the root cause of the problem, the adopted solutions can not solve the problem in a lasting manner, and the fifth solution finds the root cause of the problem, which can make the problem solved for a long time.<br>
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