全文获取类型
收费全文 | 166495篇 |
免费 | 15052篇 |
国内免费 | 11136篇 |
专业分类
耳鼻咽喉 | 1399篇 |
儿科学 | 2084篇 |
妇产科学 | 2734篇 |
基础医学 | 18630篇 |
口腔科学 | 2665篇 |
临床医学 | 21513篇 |
内科学 | 25913篇 |
皮肤病学 | 1771篇 |
神经病学 | 8560篇 |
特种医学 | 5697篇 |
外国民族医学 | 79篇 |
外科学 | 17061篇 |
综合类 | 28020篇 |
现状与发展 | 36篇 |
一般理论 | 9篇 |
预防医学 | 11119篇 |
眼科学 | 4686篇 |
药学 | 17190篇 |
166篇 | |
中国医学 | 9432篇 |
肿瘤学 | 13919篇 |
出版年
2024年 | 544篇 |
2023年 | 2537篇 |
2022年 | 6463篇 |
2021年 | 8172篇 |
2020年 | 6067篇 |
2019年 | 5448篇 |
2018年 | 5488篇 |
2017年 | 5031篇 |
2016年 | 4628篇 |
2015年 | 7080篇 |
2014年 | 8942篇 |
2013年 | 8432篇 |
2012年 | 12014篇 |
2011年 | 13255篇 |
2010年 | 8601篇 |
2009年 | 6974篇 |
2008年 | 8990篇 |
2007年 | 8853篇 |
2006年 | 8645篇 |
2005年 | 8315篇 |
2004年 | 5896篇 |
2003年 | 5589篇 |
2002年 | 4748篇 |
2001年 | 4187篇 |
2000年 | 4073篇 |
1999年 | 4084篇 |
1998年 | 2601篇 |
1997年 | 2590篇 |
1996年 | 1834篇 |
1995年 | 1718篇 |
1994年 | 1475篇 |
1993年 | 962篇 |
1992年 | 1356篇 |
1991年 | 1181篇 |
1990年 | 1009篇 |
1989年 | 913篇 |
1988年 | 779篇 |
1987年 | 729篇 |
1986年 | 547篇 |
1985年 | 495篇 |
1984年 | 260篇 |
1983年 | 186篇 |
1982年 | 123篇 |
1981年 | 121篇 |
1980年 | 79篇 |
1979年 | 122篇 |
1978年 | 59篇 |
1976年 | 52篇 |
1975年 | 55篇 |
1974年 | 65篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
31.
32.
A case of untreated fusarial onychomycosis leading to serious consequences is reported. Fusarium solani is a widespread fungus and an occasional human pathogen. It usually invades rapidly in immunocompromised hosts, and often results in a poor outcome despite treatment. We report a woman with diabetes mellitus who had untreated fusarial infection of the nails, which developed into subcutaneous fusariosis, superinfected by bacteria, and then evolved into osteomyelitis that subsequently resulted in septic shock. Early management of mycotic nails in immunocompromised hosts is crucial to prevent life‐threatening disease. 相似文献
33.
M P McMurry P N Hopkins R Gould K Engelbert-Fenton C Schumacher L L Wu R R Williams 《Journal of the American Dietetic Association》1991,91(1):57-65
We have developed a unique, family-oriented approach to lowering plasma cholesterol concentrations in persons with familial hyperlipidemias. The approach includes individual clinic visits and group nutrition classes and uses dietary goals outlined in The New American Diet. A series of 13 nutrition classes is presented to small groups, usually composed of relatives from pedigrees with familial hypercholesterolemia or other familial hyperlipidemias. Dietary action goals, cooking demonstrations, food tasting, and finger-stick plasma cholesterol determinations are important components of the classes. Problem-solving discussion is encouraged in the group. Over the past 4 years, 143 hyperlipidemic individuals, along with at least 94 unaffected family members, have participated in 31 groups, which have met for at least six classes. Many clinic participants lower plasma cholesterol by 20% or more. Keys to the success of this program include emphasizing dietary therapy, using the family setting for nutrition intervention, providing hands-on experience with food and recipes, promoting problem solving for dietary action goals, measuring blood cholesterol during classes, and encouraging long-term follow-up for participants with physicians and dietitians. 相似文献
34.
35.
BACKGROUND AND PURPOSE: Thyroidectomy is a common treatment for thyroid disorders in Taiwan, and constitutes a significant percentage of medical expenses. This study investigated the characteristics of thyroidectomy in Taiwan. METHODS: A total of 21 senior general surgeons from 16 medical centers and 5 regional hospitals participated. One surgeon from each hospital reviewed the hospital's medical records of thyroid operations performed in the year 2001. Medical records for 3846 thyroidectomies were retrospectively analyzed, including surgical indications and modalities, complications, pathology reports, and the use of antibiotics. RESULTS: Most of the patients were women (85%). Indications for surgery included proven malignancy (9%), suspicious malignancy (30%), evident compression symptoms (20%), hyperthyroidism (20%), and cosmetic reasons (12%). The majority of patients (78%) underwent a surgical procedure with lobectomy or bilateral thyroidectomy; 13% had unilateral partial thyroidectomy. Prophylactic antibiotics were administered in 46% of procedures, and continued postoperatively in 12%. Postoperative complications occurred in 12% of patients. Hypocalcemia was the most common complication (8%), and its incidence was significantly correlated with the frequency of total thyroidectomy (p < 0.01). Complete pathology reports for the thyroidectomized specimens were available in only 65% of the cases. The frequency of cosmetic reasons for surgery, unilateral subtotal resection, routine antibiotic administration, and incomplete pathology reports were significantly higher in regional hospitals than in medical centers. CONCLUSIONS: Reduction in the high rates of cosmetic reasons for surgery, unilateral partial thyroidectomy, incomplete pathology reports, and use of antibiotic prophylaxis are needed to improve the quality of thyroidectomy in Taiwan. 相似文献
36.
Pneumocephalus is a very rare complication of video-assisted thoracoscopic surgery (VATS). A 66-year-old man developed pneumocephalus secondary to thoracoscopic excision of a neurogenic tumor in the posterior mediastinum. Pneumocephalus was diagnosed by brain computed tomography. Neurosurgical intervention was performed after conservative therapy had failed. The patient's condition had resolved without any neurologic sequelae 2 years later. When a patient has a relatively large amount of chest tube drainage and neurologic symptoms after VATS, the possibility of pneumocephalus due to cerebrospinal fluid leakage must be considered. 相似文献
37.
38.
我们现在要尽量使这些治疗方法进入临床试验证明他们的可行性现在脊髓损伤的临床试验基金很有限,所以只有很少的这些治疗方法真正用于病人主要的制药厂开始对脊髓损伤治疗产生兴趣,我们现在还有很多工作要做,但是前景方向十分清楚,我们需要努力快速的工作。 相似文献
39.
淋巴瘤样肉芽肿与韦格内肉芽肿临床特点的比较 总被引:2,自引:0,他引:2
目的 总结淋巴瘤样肉芽肿病(lym phom atoid granulom atosis,LG)与韦格内肉芽肿( egener granulo Wm atosis,W G)的临床特点,从临床上加以鉴别。 方法 回顾性总结我院与北京协和医院 1989 年以来收治的 6 例 LG和20 例 W G 患者的临床资料,并进行比较。 结果 发热、咳嗽及呼吸困难在 LG 中较常见,流涕、鼻衄及关节痛以W G 为多,肺受累以 LG 为多,耳鼻喉、眼及肾病变在 W G 中明显增多,皮肤受损两者相似。W G 患者常有 c-ANCA 阳性及尿沉渣异常。 LG X 线胸片为双侧多发结节,边界不清,多无肺门、纵隔淋巴结肿大; G 则为双侧多发边界清晰W的结节, 易形成空洞, 肺门和纵隔淋巴结可肿大。LG 病理改变为血管中心性淋巴增生性病变, 浸润的细胞主要是小淋巴细胞和不同数量大的不典型淋巴细胞; 而在 W G 中可见坏死性血管炎及大量中性白细胞、浆细胞及少量嗜酸细胞浸润形成的肉芽肿, 部分有多核巨细胞。W G 经治疗后, 多数患者病情缓解; 则疗效不佳。 结论 LG 和 W G 在临 LG床表现、实验室检查、 影像及病理诸方面的差异有利于两者的鉴别诊断。 相似文献
40.
目的联合应用经腹腹膜前腹腔镜疝修补术(transabdominal preperitoneal prosthetic,TAPP)和腹腔内网片植入术(intraperitoneal onlay mesh,IPOM),探讨理想的腹腔镜下腹股沟疝修补的方法。方法2006年1月~12月,对30例成人腹股沟疝行腹腔镜下修补。以腹壁下血管内侧缘为界,把疝薄弱区纵行分成内侧和外侧,内侧采用改进的TAPP方法,外侧仍用IPOM方法。沿腹壁下血管内侧缘纵行剪开腹膜后向内侧游离的区域内基本上是无血管区,亦无重要的神经,组织疏松极易游离,数分钟内即可分离出所需要的面积(7.5 cm×6.5 cm)。补片的材料亦分为内侧和外侧,内侧是聚丙烯材料,外侧应用Proceed补片。结果30例均在硬膜外麻醉下完成,手术时间单侧30~40 min,平均35 min,双侧50~60 min,平均55min,术中出血1~5 ml,术后第2天可离床活动,术后3~4天出院,术后2周均恢复工作。术后随访2~12个月,平均9个月,无粘连性肠梗阻,腹股沟部和全身无不良反应。结论联合应用TAPP和IPOM后,能体现微创的原则,易掌握,损伤少,手术时间短,恢复快,手术效果确切。 相似文献