全文获取类型
收费全文 | 34530篇 |
免费 | 1626篇 |
国内免费 | 264篇 |
专业分类
耳鼻咽喉 | 324篇 |
儿科学 | 715篇 |
妇产科学 | 375篇 |
基础医学 | 4126篇 |
口腔科学 | 957篇 |
临床医学 | 2241篇 |
内科学 | 9177篇 |
皮肤病学 | 743篇 |
神经病学 | 2227篇 |
特种医学 | 1363篇 |
外科学 | 6055篇 |
综合类 | 140篇 |
预防医学 | 938篇 |
眼科学 | 691篇 |
药学 | 2078篇 |
中国医学 | 62篇 |
肿瘤学 | 4208篇 |
出版年
2023年 | 219篇 |
2022年 | 433篇 |
2021年 | 765篇 |
2020年 | 425篇 |
2019年 | 612篇 |
2018年 | 754篇 |
2017年 | 590篇 |
2016年 | 738篇 |
2015年 | 761篇 |
2014年 | 1057篇 |
2013年 | 1216篇 |
2012年 | 2003篇 |
2011年 | 2184篇 |
2010年 | 1268篇 |
2009年 | 1038篇 |
2008年 | 1891篇 |
2007年 | 2104篇 |
2006年 | 2044篇 |
2005年 | 2048篇 |
2004年 | 2010篇 |
2003年 | 1887篇 |
2002年 | 1878篇 |
2001年 | 679篇 |
2000年 | 713篇 |
1999年 | 701篇 |
1998年 | 482篇 |
1997年 | 376篇 |
1996年 | 354篇 |
1995年 | 298篇 |
1994年 | 267篇 |
1993年 | 234篇 |
1992年 | 365篇 |
1991年 | 385篇 |
1990年 | 353篇 |
1989年 | 390篇 |
1988年 | 357篇 |
1987年 | 280篇 |
1986年 | 254篇 |
1985年 | 259篇 |
1984年 | 174篇 |
1983年 | 144篇 |
1982年 | 96篇 |
1980年 | 70篇 |
1979年 | 153篇 |
1978年 | 113篇 |
1977年 | 102篇 |
1976年 | 76篇 |
1974年 | 103篇 |
1973年 | 82篇 |
1972年 | 80篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Akira Mogi Toshiki Yajima Kenji Tomizawa Ryoichi Onozato Shigebumi Tanaka Hiroyuki Kuwano 《Annals of thoracic and cardiovascular surgery》2015,21(5):435-439
Purpose: Small pulmonary lesions that include ground-glass attenuation have been increasingly discovered because of progressive imaging diagnostic technologies. Despite the detection of such small lesions, sometimes it is quite difficult to localize them because of their size or considerable depth from the visceral pleura. In the present study, we examined the usefulness of computed tomography-guided lipiodol marking for thoracoscopic resection of impalpable pulmonary nodules.Methods: Fifty-six patients with an undiagnosed peripheral lesion(s) of the lung who had undergone preoperative computed tomography-guided lipiodol marking followed by video-assisted thoracoscopic surgery were studied.Results: All of the nodules were successfully marked by computed tomography-guided lipiodol marking, and all except for one case were localized by means of intraoperative fluoroscopy as clear spots. With regard to complications, pneumothorax occurred in 21 patients (37.5%), and only one patient required transient drainage. Although hemorrhaging in the lung parenchyma and hemosputum occurred in nine patients (16.1%) and one patient (1.8%), respectively, no patients were in serious condition. No intra- or postoperative mortality or morbidity was observed.Conclusion: Preoperative computed tomography-guided lipiodol marking of small or impalpable pulmonary nodules is a safe and useful procedure for thoracoscopic resection of the lung. 相似文献
2.
Tasuku Ogita Rosaly Vallejo Manaois Manabu Wakagi Tomoyuki Oki Yuko Takano Ishikawa 《International journal of food sciences and nutrition》2016,67(4):431-440
Two cultivars of Japanese parsley were harvested in different seasons; their antioxidant capacities were evaluated by oxygen radical absorbance capacity (ORAC) methods, and the contents of hydrophilic and lipophilic antioxidants were compared. Japanese parsley possessed potent antioxidant capacities both in hydrophilic and lipophilic extracts when evaluated by ORAC methods. LC/MS/MS analyses revealed that chlorogenic acid and four kinds of quercetin glycosides were major antioxidants in the hydrophilic extract. Lutein was the main contributor to the antioxidant capacity of the lipophilic extract. Antioxidant capacities of the hydrophilic extracts of both cultivars tended to be higher in winter because of the increase in the contents of chlorogenic acid and quercetin glycosides. An obvious trend in the lipophilic antioxidant capacities or lutein contents was not observed irrespective of the cultivar. 相似文献
3.
4.
Byonggu An Yumi Zen Hiroya Akabori Naomi Kitamura Hiroyuki Ohta Akinori Otsuki Hiroo Mizuta Tomoyuki Tsujikawa Eiji Mekata 《Asian journal of endoscopic surgery》2021,14(1):120-123
A Bochdalek hernia (BH) is a congenital abnormality with incomplete closure of the diaphragm. It is usually manifested in infants but rarely in adults. Here, we report an adult patient with gastric volvulus and giant BH that were safely repaired by endoscopic reduction and elective laparoscopic surgery, respectively. A 79-year-old woman presented with left upper abdominal pain but no history of trauma. CT revealed a giant BH with gastric volvulus. After emergency endoscopic reduction of the volvulus, elective laparoscopic repair of the BH was performed. The 8 × 8-cm defect was repaired with interrupted nonabsorbable sutures and a mesh. The patient's postoperative course was uneventful, and no complications or recurrence were observed in the 6 months that followed. 相似文献
5.
6.
7.
8.
Munetaka Matoba Hiroyuki Tuji Yuzo Shimode Tamaki Kondo Kiyotaka Oota Hisao Tonami 《Journal of radiation research》2015,56(3):553-560
The aim of this study was to evaluate whether the lesion regression rate (ΔLR) based on the Response Evaluation Criteria in Solid Tumors (RECIST) criteria could be used for the prediction of treatment outcome in head and neck squamous cell carcinoma (HNSCC) patients treated with chemoradiotherapy (CRT) compared with FDG PET-CT. A total of 33 patients underwent MRI and PET-CT at pretreatment and at 8 weeks after CRT. We assessed the treatment outcome by analyzing the following parameters: the RECIST criteria, ΔLR, the European Organization for Research and Treatment of Cancer (EORTC) criteria, and pretreatment SUVmax of the primary tumor and node. The correlation between the analysis of the parameters and the results of the long-term follow-up of the patients was determined. The RECIST did not significantly correlate with locoregional control (LRC) or survival. The ΔLR was significantly lower for the lesions with locoregional failure (LRF) than for those with LRC. A threshold ΔLR of 48% revealed a sensitivity of 72.7% and specificity of 77.3% for the prediction of LRF. Progression-free survival (PFS) of patients with ΔLR ≥ 48% was significantly better than that of patients with ΔLR < 48% (P = 0.001), but not overall survival. There was a significant correlation between LRC and the EORTC (P = 0.02). The patients who achieved a complete response by the EORTC criteria showed significantly better PFS and overall survival (P = 0.01 and 0.04, respectively). The ΔLR was inferior to FDG PET-CT with respect to the prediction of patient survival; however, it may be useful for selecting patients in need of more aggressive monitoring after CRT. 相似文献
9.
Hiroyasu Ishikawa Tatsuo Shimomura Tetsuo Shimizu 《Seishin shinkeigaku zasshi》2006,108(10):1029-1035
There have been no systematic efforts to manage and treat patients with frontotemporal dementia (FTD), but Perry described pharmacologic interventions for some behavioral syndromes in 2001. In Perry's report, selective serotonin reuptake inhibitors (SSRI) were recommended as first choice drugs because they were well tolerated and might have an effect on some symptoms such as compulsive symptoms and eating abnormalities. Some reports were presented concerning Japanese FTD patients which showed the effect of SSRI on stereotyped behaviors and eating abnormalities by Nishikawa, et al. (2001), Ikeda, et al. (2004), and others. We describe two FTD patients with compulsive complaints of pain, one mainly on abdomen and the other on lumbar region. Fluvoxamine markedly improved their complaints of pain as well as stereotyped symptoms. Fluvoxamine might be effective for behavioral disturbances due to improvement of serotoninergic dysfunction in frontal medial and cingulated cortices, as previously described. Moreover, it has been reported that an altered response to pain stimuli, either via a loss of awareness of pain or exaggerated reaction to pain, is a specific feature of FTD, but there have been only a few reports on this feature. Fluvoxamine might be effective for compulsive complaints of pain due to improvements of compulsive symptoms and exaggerated reactions to pain in FTD, or due to the analgesic effect of SSRI. SSRI may improve compulsive complaints of pain in FTD patients. 相似文献
10.