#肛周脓肿# 肛瘘
由内口、痿管、外口三部分组成。内口常位于肛窦，多为一个；外口在肛周皮肤上，可为一个或多个，经久不愈或间歇性反复发作为其特点。任何年龄都可发病，多见于青壮年男性。复杂性肛痿是肛肠外科难治性疾病之一。【病因和病理】大部分肛痿由直肠肛管周围脓肿引起，脓肿自行破溃处或切开引流处形成外口，位于肛周皮肤。由于外口生长较快，痿管常假性愈合，导致脓肿反复发作破溃形成多个痿管和外口，使单纯性肛痿成为复杂性肛痿。结核、溃疡性结肠炎、克罗恩病等特异性炎症、恶性肿瘤、肛管外伤感染也可引起肛痿，但较为少见，约占肛痿的10%左右
【分类】
一、按照痿管高低以及痿口、痿管个数分类
1.低位单纯肛痿 2.低位复杂肛痿
3.高位单纯肛痿4.高位复杂肛痿
二、按痿管与括约肌的关系分类（亦称Parks分类）
1.肛管括约肌间型：约占肛痿的70%
2.经肛管括约肌型：约占25%
3.肛管括约肌上型：约占4%
4.肛管括约肌外型：最少见0.5%

【江苏南通：夏日紫薇花开正艳】时值盛夏，江苏南通街头、河畔及公园内的紫薇花悄然绽放，花姿娇艳烂漫，花团锦簇，为夏日增添一道靓丽的风景。As high-summer approaches, the crepe myrtle in Nantong City of east China's Jiangsu Province welcomes its peak blooming period. Streets, river banks and parks are all adorned by the purplish clouds of the common street plant, which is hardy to drought. The flower can be seen from June to September.

#Shenyang# At present, the renovation project of Lingyuan Street of Huanggu District in Shenyang is in full swing. The renovation project is scheduled to be completed in mid-September. Four pocket parks will be built along the way, and small leisure spaces, viewing spaces, and interactive spaces will be created at multiple nodes. In addition, the characteristic red culture corridor of Lingyuan Street will also be created. (Photographer: Zhang Wenkui)丨眼下，沈阳皇姑区陵园街街路更新改造工程正在紧锣密鼓进行施工。本次改造工程计划于9月中旬完成，沿途将打造4个口袋公园，并在多个节点打造小型休闲空间、观赏空间、互动空间，还将形成陵园街特色红色文化走廊。（摄影：张文魁）