如何告诉Python将一列中的每一行组合起来，并返回加起来为零的行？

def find_zero_sum_rows(matrix):
    def backtrack(row_index, cur_sum, cur_list, matrix):
        if row_index == len(matrix):
            if cur_sum == 0:
                result.append(cur_list[:])
            return
        
        for num in matrix[row_index]:
            cur_list.append(num)
            cur_sum += num
            backtrack(row_index + 1, cur_sum, cur_list, matrix)
            cur_list.pop()
            cur_sum -= num
    
    result = []
    backtrack(0, 0, [], matrix)
    return result

matrix = [[1, 2, -3], [4, -2, -2], [-1, -5, 6]]
result = find_zero_sum_rows(matrix)
print(result)

[[1, 2, -3], [4, -2, -2], [-1, -5, 6]]